Third Bimester: StudyGuide

Question 1

Classification of molecules and compounds by the number of atoms, type of compound and elements:
CuO

Answer 1

By # of atoms:
Diatomic

Type of compound:
Ionic

# of elements: 
Binary

Question 2

A formula is binary when…

Answer 2

The number of elements is equal to 2

Question 3

How do I know if a formula is ionic or covalent?

Answer 3

If it is ionic the first element should be metal.

If its covalent the first element should be non-metal.

Question 4

Anions are:

Answer 4

Negative ions

Question 5

Cations are:

Answer 5

Positive ions

Question 6

What are the greek prefixes?

Answer 6

Mono-1
Di-2
Tri-3 
Tetra-4
Penta-5
Hexa-6
Hepta-7
Octa-8
Nona-9
Deca-10

Question 7

A physical change…

Answer 7

Does not produce new substances

Question 8

In a chemical change…

Answer 8

One or more substances change into new ones

Question 9

Change in properties:

Answer 9

Change in color, in odor, formation of bubbles, formation of a precipitate.

Question 10

A change in energy:

Answer 10

Warming or cooling

Release of light

Question 11

What happens in a chemical reaction?

Answer 11

Atoms are rearranged and form new substances.

Bonds break and new bonds form.

Question 12

What is the chemical equation?

Answer 12

Reactant + Reactant -> product + product

Question 13

Which is a sign of chemical reaction?

Answer 13

Chemical properties change

Question 14

Explain why subscripts can’t change when balancing a chemical equation

Answer 14

Because only coefficient can change

Question 15

Is the reaction below possible?

H2O + NaOH -> NaCl + H2

Answer 15

It can’t be done bc there are different elements on each side

Question 16

Before a chemical reaction there are…

Answer 16

Reagents

Question 17

Every ingredient thats created after a chemical reaction…

Answer 17

Product