Chemistry - atoms elements and compounds YR 9

Question 1

What is an atom

Answer 1

the smallest part of an element

Question 2

what is an element

Answer 2

A pure substance containing only one type of atom

Question 3

what is the radius of an atom

Answer 3

1X10 to the power of minus 10 m

Question 3

what is a compound

Answer 3

formed from elements by chemical reactions

Question 4

what is the radius of a nucleus of an atom

Answer 4

1X10 to the power of minus 14 m

Question 5

what is in the first shell of an electronic configuration?

Answer 5

2 electrons

Question 6

what is in the second shell of an electronic configuration?

Answer 6

8 electrons

Question 7

what is in the third shell of an electronic configuration?

Answer 7

8 electrons

Question 8

what is in the fourth shell of an electronic configuration?

Answer 8

18 electrons

Question 9

what is the relative charge of a
proton
neutron
electron

Answer 9

neutron - 0
proton - +1
electron - -1

Question 10

what’s the formula for atomic mass of an element

Answer 10

protons + neutrons

Question 11

whats the formula for the atomic number of an element

Answer 11

protons

Question 12

what is NH4

Answer 12

ammonium

Question 13

What is ammonium

Answer 13

NH4

Question 14

What is Cu2

Answer 14

copper

Question 15

what is copper (2)

Answer 15

Cu2

Question 16

what is Zn2

Answer 16

Zinc

Question 17

what is Zinc

Answer 17

Zn2

Question 18

what is lead

Answer 18

Pb

Question 19

what is iron (2) and iron (3)

Answer 19

Fe2 & Fe3

Question 20

What is Pb

Answer 20

lead

Question 21

What is OH

Answer 21

Hydrozide

Question 22

what is hydroxide

Answer 22

OH

Question 23

what is nitrate

Answer 23

NO

Question 24

what is NO

Answer 24

nitrate

Question 25

What is OH

Answer 25

Hydroxide

Question 26

what is SO2

Answer 26

Sulfate

Question 27

what is sulfate

Answer 27

SO4 - 2

4 OXYGEN -2 CHARGE

Question 28

What is carbonate

Answer 28

C03 2- (3 0xygen - 2 charge)

Question 29

what is CO3 -2 (3 oxygen -2 charge)

Answer 29

CARBONATE

Question 30

1800s what did John Dalton discover

Answer 30

tiny spheres that couldn’t be divided

Question 31

what did JJ Thomasson discover in 1890

Answer 31

The plum pudding model sphere of positive charge with negative charges spread evenly

Question 32

What did Neils bhor discover

Answer 32

electrons orbit the nucleus at specific distances in fixed energy levels

Question 33

What did james chadwick discover

Answer 33

he provided evidence for the existence of neutrons iN a nucleus

Question 34

what does soluble mean

Answer 34

something that can be disolved

Question 35

what does solvent mean

Answer 35

a liquid used to dissolve other substance

Question 36

what does solute mean

Answer 36

a substance which has been dissolved

Question 37

what is a solutiob

Answer 37

a mixture of a solute and the solventq

Question 38

what does insoluble mean

Answer 38

something that cant be dissolved

Question 39

what dies a mixture mean

Answer 39

different types of particles not joined together