Chemistry Midterm Review

Which of the following is an example of a CHEMICAL change?

• Burning a marshmallow

• Melting a marshmallow

• Compressing a marshmallow

• Cutting a marshmallow

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many sig figs are there?
0.00400

• 1
• 3
• 5
• 6

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

How many electrons does Barium (Ba) have?

• 56
• 81
• 137
• 218

Tags

NGSS.HS-PS1-1

Identify this atom: 

• Lithium
• Chlorine
• Phosphorus 
• Fluorine

Tags

NGSS.HS-PS1-1

What charge does an atom have if it LOSES an electron? 

• Positive (+)
• Negative (-)

How many neutrons in C-14?

• 6
• 7
• 14
• 8

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

Tags

NGSS.HS-PS1-8

Which element is pictured?

• neon
• fluorine
• magnesium
• argon

Tags

NGSS.HS-PS1-1