Valence Electrons and Ions

Valence Electrons and Ions

by William Lovering

Multiple Choice

The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3

• 6

• 8

• 10

Multiple Choice

How many electrons can the d sublevel hold?

• 14

• 10

• 2

• 6

Multiple Choice

Energy levels are denoted by:

• letters

• coefficient

• superscripts

• subscripts

Multiple Choice

What is this element?

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

• Argon

• Krypton

• Selenium

• Bromide

Multiple Choice

What is the shorthand configuration for Tin?

• [Xe]5s²4d¹⁰5p²

• [Xe]5s²4d¹⁰5p²

• [Kr]5p²

• [Kr]5s²4d¹⁰5p²

Multiple Choice

Choose the Noble Gas that you would use to begin the shorthand configuration of the following element.

Plutonium (Pu)

• [Xe]

• [Ne]

• [Rn]

• [Kr]

Multiple Choice

The electron configuration for oxygen is 1s² 2s² 2p⁴

How many valence electrons does it have?

• 2

• 4

• 6

• 8

Multiple Choice

The electron configuration for tungsten is:

[Xe] 6s² 4f¹⁴ 5d⁴

How many valence electrons does it have?

• 2

• 14

• 4

• 20

Multiple Choice

How many valence electrons does this atom have?

• 5

• 8

• 2

• 15

Fill in the Blanks

Multiple Choice

Which of these atoms would it be most difficult to add or remove an electron?

• N

• O

• F

• Ne

Multiple Choice

The electron configuration for Magnesium (Mg) is:

1s² 2s² 2p⁶ 3s²

Is it more likely to lose electrons or gain electrons?

• Lose

• Gain

Multiple Choice

If an atom gains electrons its charge becomes

• +

• -

Multiple Choice

If an atom loses electrons it will become an ion called:

• cation

• anion

Multiple Choice

Which of these atoms would be the easiest to take electrons away from?

• Li

• F

• Al

Multiple Choice

Which of these atoms be more likely to gain electrons?

• Li

• F

• Al

Multiple Choice

If an atom loses electrons its charge will be

• positive

• negative

Multiple Choice

A positive ion is called a

• cation

• anion

Multiple Choice

The electron configuration for potassium is:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

Would potassium be more likely to lose electrons or gain electrons?

• lose

• gain

Multiple Choice

If an atom loses electrons it will become an ion called:

• cation

• anion