Unit 2 Test Review

Unit 2 Test Review

9th Grade

25 Qs

quiz-placeholder

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Unit 2 Test Review

Unit 2 Test Review

Assessment

Quiz

Chemistry

9th Grade

Easy

Used 18+ times

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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is an example of a new substance being formed during a chemical change?

glass breaking
metal melting
water freezing
wood burning

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Students combined baking soda and vinegar to demonstrate a chemical reaction. What indicates that a chemical reaction has occurred?

the formation of bubbles
a reduction in total mass
the disappearance of atoms
an increase in the number of atoms

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

______________- means written above (Ex: K+, I-)

superscript
subscript
valence electron

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

_____________ ____________- when an element’s outer energy level is complete (8 electrons in outer level for most elements).

stable energy
chemical bond
chemically stable

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

______________- the number written after a symbol that tells how many atoms of that element are in a unit of the compound.

superscript
subscript
coefficient

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The ____ tells you how many electrons an atom must gain, lose, or share to become stable.

atomic mass
atomic number
ionic number
oxidation number

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a symbol has no subscript, the number ________ is used.

1
2
0

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