Chemistry Pre-Assessment

An aqueous solution is one…

• that is pale blue-green in color.

• does not leave a solid when evaporated.

• contains dissolved solids.

• is dissolved in water.

If brass is 25% (by weight) copper, how many grams of copper are in 12 grams of brass?

• 3 g

• 37 g

• 48 g

• 300 g

What is the basic unit of matter and is the smallest particle of an element?

• Atoms

• Elements

• Compounds

• Molecules

Tags

NGSS.MS-PS1-1

A(n) ______________ is formed when two or more elements chemically combine.

• Compound

• Element

• Mixture

Tags

NGSS.MS-PS1-1

How many protons and electrons does nickel have?

• 28

• 58.69

Tags

NGSS.MS-PS1-1

Use the periodic table in the picture to help you answer the question. Which element would have similar properties to Lithium (Li)?

• Beryllium (Be)

• Copper (Cu)

• Sodium (Na)

• Boron (B)

Tags

NGSS.MS-PS1-1

Which of Mark’s observations would show that a burning candle is a chemical reaction?

• Black smoke is given off; hot gases are rising.

• The wax starts to melt.

• The candle is white and made of wax and a wick.

• Time passes one minute at a time.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Elements are made of 

• many types of atoms 

• the periodic table

• one type of atom 

• molecules 

Tags

NGSS.MS-PS1-1

Two or more atoms chemically bonded together are called a

• atom

• element

• molecule

• mixture

Tags

NGSS.MS-PS1-1

A pure substance that cannot be broken down into any other substance.

• Elements

• Compounds

• Mixtures