Valence Electrons and Ion Charges

Multiple Choice

How many valence electrons does the following configuration show:

1s² 2s² 2p⁶ 3s² 3p⁵ 

• 7
• 6
• 8
• 5

Multiple Choice

What is the purpose of using electron-dot notation?

• To track valence electrons

• To represent chemical bonds

• To show atomic mass

• To illustrate molecular geometry

Multiple Choice

What are the two rules for drawing Lewis dot structures as mentioned in the image?

• No side can have more than two dots

• Each side gets one dot before doubling up

• Hydrogen has a single electron

• Helium fills up with two electrons

Multiple Choice

This could be the dot diagram of 

• Ne
• Si
• Al
• Be

Multiple Choice

What is the octet rule?

• Atoms become more stable by gaining, losing, or sharing electrons.

• Atoms are more stable with eight valence electrons.

• Atoms tend to match the electron configurations of noble gases.

• This tendency to have eight electrons is called the octet rule.

Multiple Choice

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

Draw

Complete the Lewis Structure for CH₃F by adding lines between atoms for bonds, and dots on atoms for electrons.

Multiple Choice

If the overall charge of an element is NEUTRAL (=) what happens to it when it loses an electron, becoming an ion?

• becomes more positive

• becomes more negative

• turns into an isotope

• none of these

Multiple Choice

Cations _______ electrons, becoming _______ charged.

• Gain; positively (+)

• Gain; negatively (-)

• Lose; positively (+)

• Lose; negatively (-)

Multiple Choice

Based on the data, which number shows the correct location of the element that is malleable and a good conductor.

• 1

• 2

• 3

• 4

Multiple Choice

Anions ____ electrons, becoming _____ charged.

• Gain; positively (+)

• Gain; negatively (-)

• Lose; positively (+)

• Lose; negatively (-)

Multiple Choice

Based on the data, which number shows the correct location of the element that is brittle and dull.

• 1

• 2

• 3

• 4

Multiple Choice

What is the difference between a cation and an anion?

• A cation has more electrons than protons

• An anion has a positive charge

• A cation is formed by gaining electrons

• An anion is formed by losing electrons

Open Ended

Explain the process of how magnesium oxide is formed based on the electron transfer between magnesium and oxygen.

Multiple Choice

Is this atom an ion? If so what would it's charge be?

• Yes, 1-

• No it is neutral

• Yes, 1+

• Can't be determined

Multiple Choice

Anions are ___ than the atom they came from.

• larger

• smaller

• the same size

• none of the above

Multiple Choice

Cations are ___ than the atom they came from.

• larger

• smaller

• the same size

• none of the above