Chemistry Unit Assessment

Referencing the periodic table, what do the elements fluorine, chlorine, and bromine have in common?

• All are located in the same period.

• All have metallic properties.

• All are halogens, so they are not very chemically active.

• All have the same number of valance electrons.

What does X represent?

• atomic mass

• atomic number

• name of the element

• number of valence electrons

Tags

NGSS.MS-PS1-1

What does Y represent?

• atomic mass

• atomic number

• name of the element

• number of valence electrons

What does Z represent?

• atomic mass

• atomic number

• name of the element

• number of valence electrons

Tags

NGSS.HS-PS1-1

Which diagram represents a mixture?

• the first (top) one

• the second one

• the third one

• the fourth (bottom) one

Which statement is true about the organization of matter?

• Atoms can be broken down into particles called elements and compounds.

• Atoms make up elements the can chemically combine to form compounds.

• Compounds are composed of elements that chemically combine to form atoms.

• Elements are composed of compounds that chemically combine to form atoms.

Tags

NGSS.MS-PS1-1

Which statement describes a chemical property?

• Steel is shaped into automobile fenders.

• Water begins to boil when it reaches 100° C.

• Oil floats on water because it is less dense.

• Iron slowly forms rust when exposed to oxygen gas.

Tags

NGSS.MS-PS1-2

Which example shows a change in state of matter?

• liquid pouring

• wood burning

• nail rusting

• ice melting

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NGSS.MS-PS1-4

A substance changed from one state of matter to another. The image shows its particle motion in the first state and the second state. How is the transition between State 1 and State 2 best described?

• solid state to liquid state

• liquid state to solid state

• liquid state to gaseous state

• gaseous state to solid state

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The image shows an atom arrangement. Why is it considered a mixture?

• It is composed of one kind of atom.

• It is composed of extremely small particles.

• It is a physical combination of two or more different substances.

• It is composed of two or more types of elements that are chemically combined.

Tags

NGSS.MS-PS1-1