How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

Tags

NGSS.HS-PS1-1

This could be the dot diagram of

• Mg

• Cl

• C

• O

Tags

NGSS.HS-PS1-1

Is this correct way to draw the Lewis Dot Structure for Carbon?

• Yes

• No, too many electrons

• No, not enough electrons

• No, dots are in wrong places

Which ones are acceptable? Choose all correct answers

• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-3

How many valence electrons does potassium have?

• 19

• 6

• 39

• 1

Tags

NGSS.HS-PS1-1

How does Calcium become a +2 ion?

• it gains two electrons

• it loses two electrons

• it gains one electron

• it gains two electrons

What is the charge of a phosphorus ion?

• +1

• +2

• -3

• -2

• +3

What is the charge of an Aluminium ion?

• +2

• +3

• -3

• -5

How many bonds can silicon form?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-1

Which of the following ion symbols are correct? Choose all correct answers.

• S^-3

• Li⁺

• As^-3

• Sr⁺²

• F^-2

Tags

NGSS.HS-PS1-1