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Chemical Equations and Charge

Authored by Felicia Owens

Chemistry

10th - 12th Grade

Used 65+ times

Chemical Equations and Charge
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21 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The law of conservation of mass states that....

Matter can be made
Matter can be destroyed
Matter can neither be made or destroyed

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is this balanced?...
Al + O2 --> 2Al2O3

Yes!
NO!

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Balance this equation...
HgO --> 2Hg + O2

It is balanced 
2HgO --> Hg + O2
2HgO --> 2Hg + O2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

the product is doubled
the product is half the mass of the reactants
the mass is the same
the mass changes depending on the reaction

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

How many valence electrons does magnesium have?

6

12

2

10

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are valence electrons?

electrons in the outermost energy level

electrons in the innermost energy level

positively charged ions

energy used for attraction in a shell

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many valence electrons does elements in group 16 have?

16

1

6

0

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