Untitled Lesson

• The first shell (closest to the nucleus) can hold 2 electrons.

• The second shell can hold 8 electrons.

• The third shell can hold 18 electrons.

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​The number of electrons in each shell or energy level

Valence Electrons

Multiple Choice

What is the number of electrons in a completely filled second shell of an atom?

• (1) 32

• (2) 2

• (3) 18

• (4) 8

Multiple Choice

What is the number of electrons in a completely filled first shell of an atom?

• (1) 32

• (2) 2

• (3) 18

• (4) 8

Valence electrons are the most important electrons. Let us watch a video which explains what valence electrons are in detail and why they are important.

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What are valence electrons?

The outermost electrons in an atom are called the valence electrons.
The last number in the electrom configuration are the valence electrons.

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Valence electrons

Multiple Choice

The valence electrons of a Magnesium atom are located in the

• (1) first shell

• (2) second shell

• (3) third shell

• (4) fouth shell

• Fifth shell

Multiple Choice

The valence electrons of a Antimony atom are located in the

• (1) first shell

• (2) second shell

• (3) third shell

• (4) fouth shell

• Fifth Shell

Multiple Choice

What is the total number of valence electrons in an atom of Germainium in the ground state?

• (1) 4

• (2) 2

• (3) 16

• (4) 6

Multiple Choice

What is the total number of valence electrons in an atom of Oxygen in the ground state?

• (1) 4

• (2) 2

• (3) 16

• (4) 6

Log into googe classroom and complete the valence electron form

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Valence electron google form