QUESTION 1

Match the term with its correct charge.

Positive charge.

Negative charge.

Neutral: No electric charge.

A.
electron

B.
proton

C.
neutron

4 points

QUESTION 2

Fill in the blank: You can find the number of in any atom by subtracting the atomic number from the mass number.

A.
electrons

B.
neutrons

C.
protons

4 points

QUESTION 3

Match the classes of elements with their characteristics.

Shiny, a good conductor of electricity.

Dull, a poor conductor of electricity.

It contains properties of Metals and Nonmetals.

Unreactive and rarely forms compounds with other elements.

A.
Metalloid

B.
Metal

C.
Noble Gas

D.
Nonmetal

4 points

QUESTION 4

Fill in the blank: form when two or more elements combine chemically.

A.
Atoms

B.
Compounds

C.
Electrons

D.
Amino acids

4 points

QUESTION 5

As two chemicals react, the chemical bonds between the atoms in each react and break. Then, new bonds form. We call this process a chemical change or chemical reaction.

True

False

4 points

QUESTION 6

When a substance burns, a chemical reaction is taking place.

True

False

4 points

QUESTION 7

Match the term with its properties.

Contains hydrogen. Tastes sour or tart. Corrosive when strong. Reacts strongly with many metals.

Tastes bitter. Usually solids, but dissolve in water. Feels slippery because they react with the oil on your skin.

A.
bases

B.
acids

4 points

QUESTION 8

When a chemical reaction takes place, reactions will not release or absorb energy.

True

False

4 points

QUESTION 9

Inorganic compounds are compounds that do not have carbon.

True

False

4 points

QUESTION 10

Match the term with its definition.

The main fuel that cells burn to get energy.

Better known as fats and oils. They insulate you from the cold and protect and cushion your nerves.

Help form your skin and muscles. Help carry in your blood to all parts of your body. Act as enzymes.

A.
carbohydrates

B.
lipids

C.
proteins

4 points

QUESTION 11

This term can be described as "long chains of protein molecules."

A.
amino acids

B.
atoms

C.
enzymes

D.
lipids

4 points

QUESTION 12

Fill in the blank: The of a reaction depends on the chemical nature of the reactants and the products.

A.
catalyst

B.
coefficient

C.
mass number

D.
time span

4 points

QUESTION 13

By using a catalyst, you can increase the rate of a reaction.

True

False
PLs answer