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Electron Configuration and Valence Electrons

Authored by ELIZABETH LLORCA

Chemistry

8th Grade

Used 1+ times

Electron Configuration and Valence Electrons
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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the electron configuration of the element oxygen (O)?

1s² 2s² 2p⁶

1s² 2s² 2p⁴

1s² 2s¹ 2p⁶

1s² 2p⁴

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following elements has 7 valence electrons?

Nitrogen (N)

Oxygen (O)

Fluorine (F)

Sodium (Na)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which electron configuration corresponds to an atom of potassium (K)?

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p⁶

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p⁶ 5s¹

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many valence electrons are in an atom of chlorine (Cl)?

1

3

7

8

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best explains the periodic trend in the number of valence electrons across a period?

The number of valence electrons increases as you move from left to right across a period.

The number of valence electrons decreases as you move from left to right across a period.

The number of valence electrons remains constant across a period.

The number of valence electrons increases as you move down a group.

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