Gr 10 Physical Sciences Ch 2: Electronic configuration

What is the main difference between electrons in an atom?

Electrons have different shapes
Electrons have different masses
Electrons have different charges
Electrons have different amounts of energy (correct)

Where are electrons with the lowest energy found in an atom?

Farthest from the nucleus
Closest to the nucleus (correct)
In the middle energy level
In the outermost energy level

What determines an element's reactivity and properties?

The distribution of electrons among various energy levels (correct)
The number of protons in an atom
The atomic mass of an element
The number of neutrons in an atom

How are energy levels or shells around the nucleus numbered?

Sequentially (1, 2, 3, and so on) (A) Signup and view all the answers

What is the atomic number of Lithium (Li) and how many electrons does it have?

Atomic number 3, with 3 electrons (C) Signup and view all the answers

What is an orbital in an atom?

A region around an atom where an electron is likely to be found (B) Signup and view all the answers

How do the electrons in the first energy level of Lithium (Li) and Fluorine (F) differ?

Both have 2 electrons in the first energy level (D) Signup and view all the answers

What is the atomic number of Neon (Ne) and how many electrons does it have?

Atomic number 10, with 10 electrons (B) Signup and view all the answers

What is the maximum number of electrons that can occupy an orbital?

2 (B) Signup and view all the answers

Which energy level contains only one s orbital?

First energy level (C) Signup and view all the answers

What is the purpose of Aufbau diagrams?

To represent an element's electron configuration (A) Signup and view all the answers

What is Hund's rule related to?

Electron pairing (B) Signup and view all the answers

What is the term for electrons in the outermost energy level of an atom?

Valence electrons (D) Signup and view all the answers

What is the significance of a full valence shell in an atom?

It makes the atom stable and unreactive (A) Signup and view all the answers

What is the purpose of spectroscopic notation?

To provide a concise way to represent electron configurations (B) Signup and view all the answers

What is the principle that states atoms tend to form bonds until they have eight electrons in their outermost shell?

The octet rule (A) Signup and view all the answers

What is the shape of p orbitals?

Dumbbell-shaped (D) Signup and view all the answers

What is the importance of understanding electron configuration?

It helps in predicting an element's chemical behavior (D) Signup and view all the answers

What is the primary factor that determines the distribution of electrons among various energy levels in an atom?

The attractive force of the positively charged nucleus (B) Signup and view all the answers

What is the arrangement of electrons in a neutral atom of Lithium (Li)?

Two electrons in the first energy level and one electron in the second energy level (D) Signup and view all the answers

Which of the following statements is true about electrons in the same energy level?

They have the same energy and mass (C) Signup and view all the answers

What is the significance of the first energy level in an atom?

It is the energy level closest to the nucleus (B) Signup and view all the answers

How do electrons in the second energy level of Fluorine (F) and Neon (Ne) differ?

The number of electrons in the second energy level is the same for both elements (D) Signup and view all the answers

What is the primary reason for the complexity of electron arrangement in an atom?

The presence of multiple orbitals within each energy level (D) Signup and view all the answers

What is the relationship between the energy of an electron and its distance from the nucleus?

Electrons with higher energy are farther from the nucleus (A) Signup and view all the answers

What is the significance of energy levels in understanding an element's reactivity and properties?

They determine the arrangement of electrons among various energy levels (B) Signup and view all the answers

What is the correct sequence of filling orbitals in an atom?

1s, 2s, 2p, 3s, 3p, 3d (A) Signup and view all the answers

What is the purpose of Pauli's Exclusion Principle?

To assert that electrons in the same orbital must have opposite spins (B) Signup and view all the answers

What is the electron configuration of a sodium ion (Na⁺)?

1s² 2s² 2p⁶ (B) Signup and view all the answers

What is the significance of a full valence shell in an atom?

It decreases the reactivity of an atom (D) Signup and view all the answers

What is the shape of s orbitals?

Spherical (D) Signup and view all the answers

Which of the following statements about electron configuration is true?

Electrons occupy the lowest energy orbitals first (C) Signup and view all the answers

What determines the number of electrons in an orbital?

The energy level of the orbital (B) Signup and view all the answers

What is the purpose of spectroscopic notation?

To provide a concise way to represent electron configurations (D) Signup and view all the answers

What is the correct electron configuration of argon (18 electrons)?

1s² 2s² 2p⁶ 3s² 3p⁶ (A) Signup and view all the answers

What is the significance of core electrons in an atom?

They are not important in determining an element's chemical properties (D) Signup and view all the answers

What is the key concept in Aufbau diagrams?

Electrons occupy the lowest energy orbitals first (C) Signup and view all the answers

Which of the following statements is true about valence electrons?

They are crucial in determining an element's chemical properties (B) Signup and view all the answers

What is the purpose of spectroscopic notation?

To provide a concise way to represent electron configurations (C) Signup and view all the answers

Why do atoms tend to form bonds until they have eight electrons in their outermost shell?

To achieve a full valence shell (D) Signup and view all the answers

What is the significance of Hund's rule?

Electrons prefer to occupy orbitals singly (A) Signup and view all the answers

What determines the electron configuration of an atom?

The number of electrons in the energy levels (D) Signup and view all the answers

Why are electrons in the same orbital called an electron pair?

Because they are in the same orbital (D) Signup and view all the answers

What is the purpose of understanding electron configuration?

To predict and explain an element's chemical behavior (C) Signup and view all the answers

What is the difference between s and p orbitals?

s orbitals are spherical, and p orbitals are dumbbell-shaped (D) Signup and view all the answers

What is the importance of Pauli's Exclusion Principle?

It asserts that two electrons in the same orbital must have opposite spins (D) Signup and view all the answers

What is the primary factor that determines the energy of an electron in an atom?

The distance from the nucleus (A) Signup and view all the answers

In which energy level do electrons with the highest energy reside?

The outermost energy level (A) Signup and view all the answers

What is the purpose of understanding the distribution of electrons among various energy levels in an atom?

To understand the reactivity and properties of an element (A) Signup and view all the answers

In a neutral atom of Lithium (Li), how many electrons occupy the first energy level?

2 electrons (D) Signup and view all the answers

What is the difference between the first energy level and the second energy level in an atom?

The energy of the electrons they contain (D) Signup and view all the answers

Why do electrons in higher energy levels have higher energy?

Because they are able to overcome the nucleus's attractive force (A) Signup and view all the answers

What is the significance of the first energy level in an atom?

It contains the lowest energy electrons (A) Signup and view all the answers

What is the relationship between the energy of an electron and its distance from the nucleus in an atom?

As the energy of an electron increases, its distance from the nucleus increases (B) Signup and view all the answers

What is the primary reason for the difference in energy between electrons in the same atom?

Their different distances from the nucleus (B) Signup and view all the answers

Which of the following statements is true about electrons in the same energy level?

They occupy different orbitals but have the same energy (B) Signup and view all the answers

What is the significance of the energy levels in understanding an element's reactivity?

They determine the element's reactivity and properties (C) Signup and view all the answers

How do the electrons in the first and second energy levels of an atom differ?

They have different energies and occupy different orbitals (C) Signup and view all the answers

What is the correct arrangement of electrons in a neutral atom of Fluorine (F)?

The first two electrons occupy the first energy level, and the remaining seven electrons fill the second energy level (C) Signup and view all the answers

What is the significance of the electron arrangement in an atom?

It determines the element's reactivity and properties (B) Signup and view all the answers

What is the primary factor that determines the distribution of electrons among various energy levels in an atom?

The energy of the electrons (B) Signup and view all the answers

Which of the following statements is true about the electron arrangement in an atom?

Electrons occupy different orbitals in the same energy level (B) Signup and view all the answers

Which of the following is NOT a guideline for determining electron configuration?

Each orbital can hold a maximum of three electrons (C) Signup and view all the answers

What is the primary reason why atoms tend to form bonds until they have eight electrons in their outermost shell?

To achieve a full valence shell and become less reactive (B) Signup and view all the answers

Which of the following statements about Aufbau diagrams is TRUE?

Aufbau diagrams show the sequence of filling orbitals in an atom (D) Signup and view all the answers

What is the term for the electrons that are NOT involved in chemical bonding?

Core electrons (D) Signup and view all the answers

Which of the following orbitals has a dumbbell shape?

p orbital (C) Signup and view all the answers

What is the maximum number of electrons that can occupy the third energy level?

18 (C) Signup and view all the answers

Which of the following is a consequence of Pauli's Exclusion Principle?

Electrons in the same orbital have opposite spins (C) Signup and view all the answers

What is the primary purpose of spectroscopic notation?

To provide a concise way to represent electron configurations (A) Signup and view all the answers

Which of the following energy levels contains one s orbital and five d orbitals?

Third energy level (A) Signup and view all the answers

What is the primary factor that determines the complexity of electron arrangement in an atom?

The energy levels in an atom (B) Signup and view all the answers

What is the correct sequence of filling orbitals in an atom?

1s, 2s, 2p, 3s, 3p, 3d (B) Signup and view all the answers

Which of the following statements about electrons in the same energy level is true?

Electrons occupy the lowest energy orbitals first (C) Signup and view all the answers

What determines the electron configuration of an atom?

The number of electrons in the atom (C) Signup and view all the answers

What is the significance of the octet rule in chemical reactions?

It states that atoms tend to form bonds until they have eight electrons in their outermost shell (C) Signup and view all the answers

Which of the following statements about Aufbau diagrams is true?

They are used to determine the electron configuration of an atom (A) Signup and view all the answers

Gr 10 Physical Sciences Ch 2: Electronic configuration

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Questions and Answers

What is the main difference between electrons in an atom?

Where are electrons with the lowest energy found in an atom?

What determines an element's reactivity and properties?

How are energy levels or shells around the nucleus numbered?

What is the atomic number of Lithium (Li) and how many electrons does it have?

What is an orbital in an atom?

How do the electrons in the first energy level of Lithium (Li) and Fluorine (F) differ?

What is the atomic number of Neon (Ne) and how many electrons does it have?

What is the maximum number of electrons that can occupy an orbital?

Which energy level contains only one s orbital?

What is the purpose of Aufbau diagrams?

What is Hund's rule related to?

What is the term for electrons in the outermost energy level of an atom?

What is the significance of a full valence shell in an atom?

What is the purpose of spectroscopic notation?

What is the principle that states atoms tend to form bonds until they have eight electrons in their outermost shell?

What is the shape of p orbitals?

What is the importance of understanding electron configuration?

What is the primary factor that determines the distribution of electrons among various energy levels in an atom?

What is the arrangement of electrons in a neutral atom of Lithium (Li)?

Which of the following statements is true about electrons in the same energy level?

What is the significance of the first energy level in an atom?

How do electrons in the second energy level of Fluorine (F) and Neon (Ne) differ?

What is the primary reason for the complexity of electron arrangement in an atom?

What is the relationship between the energy of an electron and its distance from the nucleus?

What is the significance of energy levels in understanding an element's reactivity and properties?

What is the correct sequence of filling orbitals in an atom?

What is the purpose of Pauli's Exclusion Principle?

What is the electron configuration of a sodium ion (Na⁺)?

What is the significance of a full valence shell in an atom?

What is the shape of s orbitals?

Which of the following statements about electron configuration is true?

What determines the number of electrons in an orbital?

What is the purpose of spectroscopic notation?

What is the correct electron configuration of argon (18 electrons)?

What is the significance of core electrons in an atom?

What is the key concept in Aufbau diagrams?

Which of the following statements is true about valence electrons?

What is the purpose of spectroscopic notation?

Why do atoms tend to form bonds until they have eight electrons in their outermost shell?

What is the significance of Hund's rule?

What determines the electron configuration of an atom?

Why are electrons in the same orbital called an electron pair?

What is the purpose of understanding electron configuration?

What is the difference between s and p orbitals?

What is the importance of Pauli's Exclusion Principle?

What is the primary factor that determines the energy of an electron in an atom?

In which energy level do electrons with the highest energy reside?

What is the purpose of understanding the distribution of electrons among various energy levels in an atom?

In a neutral atom of Lithium (Li), how many electrons occupy the first energy level?

What is the difference between the first energy level and the second energy level in an atom?

Why do electrons in higher energy levels have higher energy?

What is the significance of the first energy level in an atom?

What is the relationship between the energy of an electron and its distance from the nucleus in an atom?

What is the primary reason for the difference in energy between electrons in the same atom?

Which of the following statements is true about electrons in the same energy level?

What is the significance of the energy levels in understanding an element's reactivity?

How do the electrons in the first and second energy levels of an atom differ?

What is the correct arrangement of electrons in a neutral atom of Fluorine (F)?

What is the significance of the electron arrangement in an atom?

What is the primary factor that determines the distribution of electrons among various energy levels in an atom?

Which of the following statements is true about the electron arrangement in an atom?

Which of the following is NOT a guideline for determining electron configuration?

What is the primary reason why atoms tend to form bonds until they have eight electrons in their outermost shell?

Which of the following statements about Aufbau diagrams is TRUE?

What is the term for the electrons that are NOT involved in chemical bonding?

Which of the following orbitals has a dumbbell shape?

What is the maximum number of electrons that can occupy the third energy level?

Which of the following is a consequence of Pauli's Exclusion Principle?

What is the primary purpose of spectroscopic notation?

Which of the following energy levels contains one s orbital and five d orbitals?

What is the primary factor that determines the complexity of electron arrangement in an atom?

What is the correct sequence of filling orbitals in an atom?

Which of the following statements about electrons in the same energy level is true?

What determines the electron configuration of an atom?

What is the significance of the octet rule in chemical reactions?