Isotopes and Atomic Structure

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What is the electron configuration of the element with 10 electrons?

1s2 2s1 2p7

1s2 2s1 2p6 (correct)

1s2 2s2 2p6

1s2 2s2 2p5

How many valence electrons does an atom with the electron configuration 1s2 2s2 2p6 have?

6

8 (correct)

10

7

In which energy state would an electron configuration of 1s1 2s2 2p6 be considered?

Excited state

Elevated state

De-energized state

Ground state (correct)

Which of the following best describes isotopes?

Atoms of the same element with different numbers of neutrons Signup and view all the answers

In Tritium (3 1 H), how many protons, neutrons, and electrons are present, respectively?

1, 2, 3 Signup and view all the answers

Which ion is formed when Uranium loses two electrons?

U2+ Signup and view all the answers

What does the term 'ion' refer to?

An atom or a group of atoms that lose or gain electrons to form a charge Signup and view all the answers

What is the mass number of an atom?

The total number of protons and neutrons in the nucleus Signup and view all the answers

How is the atomic number represented in the symbol of an element in the periodic table?

As a subscript before the symbol Signup and view all the answers

What is the relationship between the mass number and the atomic number of an atom?

Mass number is greater than atomic number Signup and view all the answers

Which subatomic particle is not found in the nucleus of an atom?

Electron Signup and view all the answers

Isotopes and Atomic Structure

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Questions and Answers

What is the electron configuration of the element with 10 electrons?

How many valence electrons does an atom with the electron configuration 1s2 2s2 2p6 have?

In which energy state would an electron configuration of 1s1 2s2 2p6 be considered?

Which of the following best describes isotopes?

In Tritium (3 1 H), how many protons, neutrons, and electrons are present, respectively?

Which ion is formed when Uranium loses two electrons?

What does the term 'ion' refer to?

What is the mass number of an atom?

How is the atomic number represented in the symbol of an element in the periodic table?

What is the relationship between the mass number and the atomic number of an atom?

Which subatomic particle is not found in the nucleus of an atom?

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