Chapter7TESTChemistry

1.

1 point

A polymer is:

A metal and a non-metal chemically joined together

A molecule that has a long chain of atoms

A chemical that is made in a laboratory (synthetic)

2.

1 point

Photosynthesis is a process where:

Plants take in oxygen and glucose (sugar) to make water and carbon dioxide

Plants decompose to make nutrients for the soil

Plants take in Carbon Dioxide and water to produce glucose (sugar) and oxygen

3.

1 point

Which of the following chemicals are ONLY elements

Hydrogen gas (H2), Oxygen gas (02), Iron (Fe)

Hydrogen gas (H2), water (H20), Carbon Dioxide (CO2)

Iron (Fe), Methane (CH4), Oxygen Gas (02)

4.

1 point

Which of the following is a mixture?

seawater

Gold

Diamond

5.

1 point

Most of the elements on the Periodic Table are:

Non-metals

Metals

Metalloids

6.

1 point

The white powder (magnesium oxide) formed when magnesium is burnt in oxygen is a:

compound

mixture

element

7.

1 point

Water can be electrically split into elements

hydrogen and carbon

carbon and oxygen

hydrogen and oxygen

8.

1 point

Carbon atoms in the bodies of living things return to the air in several ways. These are:

respiration, decomposition, burning

respiration, photosynthesis, burning

respiration, photosynthesis, decomposition

9.

1 point

Mixtures are only elements and different compounds combined together

True

False

10.

1 point

Which of the following is a compound?

soft drink

pure salt

brass

11.

1 point

A shorthand way of writing an element is to use:

atomic numbers

it's chemical symbol

a drawing of the atom

12.

1 point

Sodium ion, a group one metal that has lost its outer electron chemically to join in a compound, would have the formula:

Na

Na+

Na-

13.

1 point

What are usually very different from the elements of which they are made

mixtures

elements

compounds

14.

1 point

A number of people have contributed to the development of the atom model over the last 2500 years. The order of people's contributions from earliest to most recent was:

Rutherford, Bohr, Democritus

Bohr, Democritus, Rutherford

Democritus, Rutherford, Bohr

15.

1 point

Atoms of one element are BONDED very tighly to atoms of another element in:

compounds

atoms

mixtures

16.

1 point

An element is defined as:

a mixture of atoms all with different atomic numbers

a chemical that cannot be broken down into other substances

different atoms chemically bonded together

17.

1 point

A vertical column on the Periodic table is called a:

Atomic Number

Group

Period

18.

1 point

Which of the following chemicals are ALL molecules

H20, Ne, CO2, NH3

Fe, H20, CO H2

CH3Ch2OH, C02, C6H12O6, 02