Key Words

Question 1

Atom

Answer 1

Atoms are small particles from which all substances are made they are the smallest neutral part of an element that can take part in chemical reactions

Question 2

Electron

Answer 2

Tiny particle with a negative charge that is found in shells around the nucleus of an atom

Question 3

Electron shell

Answer 3

Area around the nucleus that can be occupied by electrons usually drawn as a circle in a Target diagram . also called an electron energy level or an orbit

Question 4

Element

Answer 4

A simple substance made up of only one type of atom

Question 5

Neutron

Answer 5

Electrically neutral subatomic particle found in the nucleus of most atoms

Question 6

Nucleus

Answer 6

The positively charged centre. Of an atom

Question 7

Protons

Answer 7

A positively charged subatomic particles in the nucleus of all atoms

Question 8

Relative charge

Answer 8

The electric charge of the subatomic particle compared to the charge on a proton

Question 9

Relative mass

Answer 9

The mass of a subatomic particle compare to the mass of a proton

Question 10

Subatomic particle

Answer 10

The smaller particles that make up atoms protons neutrons and electrons

Question 11

Atomic number

Answer 11

The number of protons in the nucleus of an atom also known as the proton number

Question 12

Mass number

Answer 12

The total number of protons and neutrons in the nucleus of an atom also known as the nucleon number

Question 13

Periodic table

Answer 13

Charting much the elements are arranged in order of increasing atomic number

Question 14

Ar

Answer 14

Symbol for relative atomic mass in brackets RAM

Question 15

Isotopes

Answer 15

Atoms of an element with the same number of protons but different mass numbers due to different number of neutrons

Question 16

Mean

Answer 16

On average calculated by adding up the values of a set of measurements and dividing by the number of measurement in the sat

Question 17

Nuclear fission

Answer 17

The reaction in which the nucleus of a large atom such as uranium splits into two smaller nuclei

Question 18

Relative atomic mass

Answer 18

The main mass of an atom relative to the mass of an atom of carbon 12 which is assigned a massive 12 the room of an element is the main relative mass of the isotopes of an element

Question 19

What is a

Answer 19

The mass number which is also the higher number and then number of protons and neutrons

Question 20

What is z

Answer 20

The atomic number which is the smaller number and it is the number of protons