Chemistry STAAR Review

Which of the following correctly identifies the number of each element involved in the chemical formulas? NH₄CO₃

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Tags

NGSS.MS-PS1-1

How many hydrogen atoms are in 4H₂O?

• 6

• 8

• 2

• 4

Tags

NGSS.MS-PS1-1

How many Oxygen are in Al₂(SO₄)₃?

• 4

• 12

• 7

• 24

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

Is melting butter for popcorn a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following is an example of a chemical reaction?

• A marshmallow turning black when heated over a fire

• A powder dissolving in water to make lemonade

• An ice cube melting into a puddle of water

• Salt crystals being crushed into a powder
  

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What number indicates the nucleus?

• 1

• 2

• 3

• 4

A horizontal row of elements in the periodic table

• Molecule

• Period

• Family

• Atom

The smallest particle of an element.

• Element

• Molecule

• Atom

Tags

NGSS.MS-PS1-1

A combination of two or more atoms

• Period

• Molecule

• Atom

• Family

Tags

NGSS.MS-PS1-1