c1.2 atomic structure

Question 1

what does atom mean?

Answer 1

a building block of matter and the smallest particle of an element

Question 2

what does element mean?

Answer 2

substances made of only one type of atom

Question 3

what does compound mean?

Answer 3

group of atoms from different elements joined to-gather by chemical bonds in a fixed ratio

Question 4

what are subatomic particles?

Answer 4

particles from which atoms are made, including protons, neutrons and electrons

Question 5

what size are atomic radii and bond lengths?

Answer 5

10^-10m

Question 6

how is the size of an atom given?

Answer 6

as its atomic radius(half its diameter)

Question 7

what are the three particles in an atom?

Answer 7

protons, electrons and neutrons

Question 8

what is the centre of a particle?

Answer 8

nucleus

Question 9

what’s the lightest particle?

Answer 9

electrons 1/1840

Question 10

why does an atom have no charge?

Answer 10

an atom has no charge because it has the same number of protons and electrons

Question 11

what is the relative mass and charge of subatomic mass?

Answer 11

proton- +1 and 1
neutron- 0 and 1
electron- -1 and 0.0005

Question 12

where is the mass of an atom located?

Answer 12

in it’s nucleus

Question 13

what is a substance containing only one type of atom called?

Answer 13

element

Question 14

what are an atoms nucleus surrounded by?

Answer 14

shells of electrons

Question 15

what happens when atoms of different elements join together?

Answer 15

they form compounds

Question 16

what happens when small numbers of atoms join together?

Answer 16

they form molecules

Question 17

what is a mass number?

Answer 17

number of protons and number of neutrons

Question 18

what is an atomic number?

Answer 18

number of protons and position of the symbol

Question 19

how to calculate of sub-atomic particles?

Answer 19

number of protons= atomic number
number of electrons= number of protons
number of neutrons= mass number-atomic mass

Question 20

what is isotopes?

Answer 20

atoms of the same element with the same number of protons(atomic number) but a different number of neutrons

Question 21

exam question
18 O
8

Answer 21

it has 8 electrons and 10 neutrons
0xygen has 6 electrons in it’s outer shell so it is in group 6
electron configuration-2e in the first shell and 6e in the second shell(2.6)