Chemistry STAAR Review

How many protons and electrons does this element have?

• 35

• 18

• 17

• 52

Tags

NGSS.MS-PS1-1

How many neutrons does calcium have?

• 20

• 40

• 60

• 0

Tags

NGSS.MS-PS1-1

What would Au (Gold) be categorized as on the periodic table?

• Nonmetal

• Metal

• Transitional metal

• Noble gas

An element has an atomic number of 9 and a mass of 19 amu. What is the number of protons this element has?

• 9

• 19

• 10

• 28

Tags

NGSS.MS-PS1-1

Beryllium is in group number______.

• Group 2

• Group 3

• Group 4

• Group 7

Tags

NGSS.MS-PS1-1

The period for Bromine is ___________.

• 3

• 2

• 4

Which of the following is NOT an example of a chemical change?

• burning match

• a car rusting

• baking a cake

• melting ice

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which evidence demonstrates that a chemical change has occurred.

• water level rises

• water becomes cloudy

• gas is produced (bubbles)

• tablet dissolves

Tags

NGSS.MS-PS1-2

Precipitant is when you mix two liquid chemicals and something new forms at the bottom of the container. This is ...

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

Marie had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and pickle juice?

• A chemical reaction produced a solid.

• A chemical reaction produced a gas.

• No chemical reaction took place.

• Only a physical change happened.

Tags

NGSS.MS-PS1-2