Atoms Elements Compounds and Mixtures

Question 1

Name the tiny particles that make up all matter.

Answer 1

Atoms

Question 2

State the two broad categories that elements can be
divided into.

Answer 2

Metals and Non-Metals

Question 3

List the names of the three subatomic particles that make up atoms.

Answer 3

Protons, Electrons and Neutrons

Question 4

State the number of electrons that can be held in the first, second, and third electron shells of an atom.

Answer 4

1st -2, 2nd - 8, 3rd - 18, 4th -32

Question 5

Explain why it is impossible to have a monatomic compound.

Answer 5

Compounds have two different elements, and monoatomic means only one atom (type) - one element.

Question 6

Describe the structure of an atom in terms of the three subatomic particles.

Answer 6

Protons and neutrons are in the nucleus, and electrons are in the cloud (shells).

Question 7

Atoms are

Answer 7

Smallest building blocks of matter

Question 8

Brittle means

Answer 8

easily crumbles or shatters

Question 9

Ductile…

Answer 9

able to be stretched to form a wire

Question 10

Elements

Answer 10

Substances made up of only one type of atom

Question 11

malleable

Answer 11

able to be hammered or bent into a new shape

Question 12

Metals are

Answer 12

substances that have a metallic shine, conduct heat and electricity, can be hammered into sheets, and drains into wires

Question 13

Molecules

Answer 13

clusters of atoms

Question 14

Monoatomic elements

Answer 14

elements that consist of single atoms

Question 15

Non metals

Answer 15

substances that are dull, do not conduct heat or electricity and they break and crumble

Question 16

Period table

Answer 16

a table that shows all the known elements (117)

Question 17

Properties

Answer 17

characteristics of a substance

Question 18

Alloys

Answer 18

mixtures of a metal with other metals, or non-metals

Question 19

Compounds

Answer 19

substances made of lattices or identical molecules with two or more types of atoms

Question 20

Mixtures

Answer 20

Any combination of two or more elements or compounds

Question 21

Atomic number

Answer 21

the number of protons in an atom

Question 22

Electrons

Answer 22

the negatively charged subatomic particles that form a cloud around the nucleus of an atom

Question 23

Electronic shells

Answer 23

areas around an atom in which electrons spin

Question 24

Mass Number

Answer 24

the number of protons and neutrons in an atom

Question 25

Matter

Answer 25

anything that has mass and takes up space

Question 26

Neutrons

Answer 26

the neutral subatomic particles that sit in the nucleus of an atom with the protons

Question 27

Nucleus

Answer 27

the cluster of protons and neutrons at the centre of an atom

Question 28

Protons

Answer 28

the positive subatomic particles that sit in a nucleus of an atom with the neutrons

Question 29

Subatomic particles

Answer 29

the particle that make up atoms (protons, neutrons and electrons)