Matter

Question 1

Atom

Answer 1

particle of matter
consists of a nucleus that is surrounded by electrons

Question 2

Electron

Answer 2

negatively charged particle that orbits the nucleus

Question 3

Proton

Answer 3

positvly charged subatomic particle in the nucleus
determines element

Question 4

Electron configuration

Answer 4

2,8,8,2

Question 5

element

Answer 5

a substance that cannot be broken down into any other substance

Question 6

molecule

Answer 6

made up of two or more atoms
can be differnet or the same

Question 7

ionic bonding

Answer 7

type of linkage
when valence electrons are permanently transferred to another atom

Question 8

Periodic Table

Answer 8

a table in which elements are arranged in order of atomic number and groupd according to properties

Question 9

electrical stability

Answer 9

if outer shell is full its stable

Question 10

ion

Answer 10

a charges atom that has an unequal amount of protons and electrons
(either lost or gained electrons)

Question 11

alpha particle

Answer 11

radioactive particle containing two protons and two neutrons
can be stopped by paper

Question 12

beta particle

Answer 12

radioactive particle with little mass
e-g.electron
can be stopped by tinfoil

Question 13

neutron

Answer 13

a neutral,no charge, subatomic particle in the nucleus

Question 14

Nucleus

Answer 14

the centre of an atom
Contains protons and neutrons

Question 15

Electron shell

Answer 15

a defined area of space in which electrons move around an atoms nucleus

Question 16

Atomic number

Answer 16

number of protons

Question 17

Mass number

Answer 17

the number of protons + neutrons

Question 18

Neutral

Answer 18

has no charge

Question 19

Isotope

Answer 19

an isotope is a different form of an element
Has more or less neutrons in the nucleus

Question 20

Gamma rays

Answer 20

high energy electromagnetic rays released as part of radioactive decay
Can be stopped by lead

Question 21

Half-life

Answer 21

the time taken for half of the radioactive nuclei in a sample to decay

Question 22

Anion

Answer 22

atoms that gain electrons to become electrically stable

Question 23

Cation

Answer 23

atoms which loose electrons to be electrically stable

Question 24

Radiation

Answer 24

energy that comes from a source and travels through a source at the speed of light