up and atom

Question 1

structure of an atom

Answer 1

an atom is made up of subatomic particles. it has a nucleus which holds it’s protons and neutrons while electrons spin rapidly around the nucleus in shells

Question 2

shell pattern for first 20 elemenets

Answer 2

2,8,8,2

Question 3

rule 1

Answer 3

atomic number = number of protons

Question 4

rule 2

Answer 4

number of protons = number of electrons

Question 5

rule 3

Answer 5

mass number = protons + neutrons
neutrons = mass number - protons

Question 6

protons charge =

Answer 6

positive

Question 7

electron charge =

Answer 7

negative

Question 8

neutron charge =

Answer 8

neutral/no charge

Question 9

valence shell

Answer 9

outermost electron shell

Question 10

ion

Answer 10

formed when an atom gains or loses electrons (from it’s valence shell)

Question 11

cation

Answer 11

(positive ion) when an atom loses electrons it has more protons than electrons giving it a positive charge

Question 12

anion

Answer 12

(negative ion) when an atom gains electrons it as more electrons than protons giving it a negative charge

Question 13

formula of an ion

Answer 13

element symbol with the number of electrons it gained or lost (unless it’s one) next to it before a positive or negative symbol depending on which it is

Question 14

isotopes

Answer 14

atoms of the name element with different mass numbers (different amounts of neutrons)

Question 15

metallic bonding

Answer 15

a lattice of positive cations that has free delocalised electrons flowing through the lattice