Review

What is the shorthand electron configuration for Sulfur atom?

• [Ar] 3p⁴
• [He] 3s²3p⁴
• [Ne] 3s²3p⁴
• [Na] 3s²3p³
  

Tags

NGSS.HS-PS1-1

How many valence electrons does phosphorus have?

• 5
• 2
• 8
• 15

Tags

NGSS.HS-PS1-1

What atom matches this electron configuration?
[Xe] 6s² 4f¹⁴ 5d⁹

• Mercury
• Gold
• Platinum
• Thallium

Tags

NGSS.HS-PS1-1

What is the noble gas configuration for beryllium?

• [He]1s²
• [He]2s²
• [Li]2s¹
• [Li]2s²

Tags

NGSS.HS-PS1-1

Jack has a rock. The rock has a mass of 14g and a volume of 2cm³. What is the density of the rock?

• 7 mL
• 7 g/cm³
• 28 g/cm³
• 1/7 g/cm³

Tags

CCSS.HSG.MG.A.2

Frank has a paper clip. It has a mass of 9g and a volume of 3cm³. What is its density?

• 3 g/cm³
• 1/3 g/cm³
• 27 g/cm³
• 39 g/cm³

Tags

CCSS.HSG.MG.A.2

Why do some substances float on water?

• they are warmer than water
• they are cooler than water
• they are more dense than water
• they are less dense than water

What is the charge does a sodium ion have?

• +2
• +1
• -1
• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Negative ions form when atoms _________ valence electrons.

• lose
• gain
• share

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Group 17 always has ions with a charge of 

• +1
• +2
• -1
• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2