Bohr Atomic Model Questions

Questions and Answers

What part of the periodic table tells you the number of protons found in the nucleus of the atom of that element?

The atomic number

By using the periodic table, how did you determine how many neutrons are in the most common isotope of an element?

Atomic mass subtracted by the atomic number

How many electrons are needed to fill the first energy level?(1) The second energy level?(2) Third energy level (if it is not the outermost level)?____(3)

2, 8, 18

Which two atoms will have their outer energy level filled with 2 electrons?

Helium and everything in the green rows Signup and view all the answers

What are valence electrons?

The electrons on the outermost shell Signup and view all the answers

What do valence electrons determine about an element?

Whether it reacts with other elements and its chemical properties Signup and view all the answers

What is the importance of 8 valence electrons? (1) Which atoms need only 2 valence electrons to have a filled outer level? (2)

<ol> <li>To say that it's a full shell and doesn't need any other electrons. 2) Helium and all the alkaline earth metals</li> </ol> Signup and view all the answers

What do all noble (inert) gases have in common? Why don't noble gases react with other elements?

They all have a full outer shell, so they don't need to react with other elements Signup and view all the answers

What is in common between all the elements in the same column in the periodic table?

They all have similar chemical properties Signup and view all the answers

Why does sodium want to bond with chlorine? Explain how the giving and taking of electrons works between sodium and chlorine.

Sodium wants to bond with chlorine because together they have 8 valence electrons. Chlorine has 7 valence electrons, and sodium has 1 valence electron. Signup and view all the answers

Study Notes

Atomic Structure Basics

The atomic number indicates the number of protons in an atom's nucleus, represented as a whole number above the element’s chemical symbol on the periodic table.
To find the number of neutrons in the most common isotope, subtract the atomic number from the atomic mass.

Electron Configuration

The first energy level can hold 2 electrons, the second can hold 8, and the third can accommodate up to 18 electrons, provided it is not the outermost energy level.

Valence Electrons

Valence electrons are the electrons located in the outermost shell of an atom.
These electrons play a crucial role in determining an element's reactivity and chemical properties.

Stability of Electron Shells

Having 8 valence electrons signifies a full shell, implying stability and a reduced need to interact with other elements.
Helium and alkaline earth metals are exceptions that require only 2 valence electrons to complete their outer level.

Noble Gases

Noble gases possess a full outer shell of electrons, which results in minimal reactivity with other elements due to their stable configuration.

Group Similarities

Elements located in the same column of the periodic table share similar chemical properties because they have the same number of valence electrons.

Ionic Bonding Example

Sodium (Na) has 1 valence electron while chlorine (Cl) has 7. To achieve a stable configuration of 8 valence electrons, sodium donates its electron to chlorine, resulting in a bond.

Description

Test your knowledge on the Bohr atomic model with this worksheet of flashcard questions. Discover how elements are represented in the periodic table, including atomic numbers and isotopes. Perfect for enhancing your understanding of atomic structure.