Category 1: Matter & Energy

 What is the mass number of this element?

• 5
• 27
• 32
• 59

An atom of an element contains 20 protons.  What is the identity of the element?

• argon
• calcium
• neon
• potassium

All of the following are indicators of a chemical change except -

• formation of a gas
• change in temperature
• change in the state of matter
• formation of a precipitate

The overall charge of the atom's nucleus is

• 0

• positive

• negative

• Neutral

Four students performed four different investigations by combining different substances. Their results are shown in the table provided. In which experiment are new substances being formed?

• Experiment 1
• Experiment 2
• Experiment 3
• Experiment 4

Tags

NGSS.MS-PS1-2

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

• 1

• 2

• 3

• 4

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

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-2

Which of the models best represents CaCO₃?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Tags

NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1