Atomic structure

Question 1

Protons

Answer 1

Positively charged particles found in the nucleus
Has mass of 1
+1 charge

Question 2

Neutrons

Answer 2

Neutral particles found in nucleus
Mass of 1
Charge of 0

Question 3

Electrons

Answer 3

Negatively charged particles that orbit the nucleus in energy levels or shell
Mass is close to 0
-1 charge

Question 4

Nucleus

Answer 4

A dense, positively charged centre of the atom that contains protons and neutrons
Almost all the atoms mass is concentrated here

Question 5

Electron shells

Answer 5

The shells are filled in a specific order of electrons
First cell-2
Second shell-8
Third shell-8. etc

Question 6

Atomic number

Answer 6

The number of protons in the nucleus which defines the element
Usually shown on top of an atoms box in periodic table

Question 7

Mass number

Answer 7

The total number of protons and neutrons in a nucleus
Mass number isnt usually shown on periodic table

Question 8

Isotopes

Answer 8

Atoms of the same element that have the same number of protons but a different number of neutrons
Same atomic number but different mass number

Question 9

Ions

Answer 9

Atoms can lose or gain electrons to form ions
So there are either positively charged ions or negatively charged ions