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Question 1

what are the 4 states of matter and their symbol

Answer 1

solid (s), liquid (l), aqueas(aq), gas (g)

Question 2

what did Democritus discover about the atom

Answer 2

everything is made from atoms

Question 3

what did dalton discover about the atom

Answer 3

atom was a sphere shape, which are invisible and compounds are combinations of atoms

Question 4

who and when was the plumb pudding model created

Answer 4

JJ Thompson (1897)

Question 5

what was the concept of the plumb pudding model

Answer 5

sphere with negative dotted electrons, with a cloud with a positive charge

Question 6

what experiment did Rutherford, Geiger and Marsden create, what did it do

Answer 6

gold foil experiment in 1911, most particles past straight through but some deflected concluding the atom has a positive nucleus

Question 7

what did bohr conclude from the gold foil experiment

Answer 7

that the nucleus is positive and electrons are arranged in shells (1913)

Question 8

what did Rutherford later discover about the atom

Answer 8

atoms nucleus contained this positively charged matter known as protons

Question 9

what did Chadwick conclude about the atom

Answer 9

atoms nucleus contains positively charged matter known as neutrons

Question 10

what was the order of the discoveries about the atom

Answer 10

Democritus, Dalton, JJ Thompson, Rutherford (Geiger and Marsden), Bohr, Rutherford again, Chadwick

Question 11

what’s electrons mass and charge

Answer 11

mass = 0.0005 charge = -1

Question 12

whats the atomic radius

Answer 12

around 0.1nm

Question 13

what’s neutrons mass and charge

Answer 13

mass = 1 charge = 0

Question 14

what’s protons mass and charge

Answer 14

mass = 1 charge = +1

Question 15

which number is atomic number

Answer 15

smaller number

Question 16

what numbers mass number

Answer 16

the bigger number

Question 17

how to find number of electrons

Answer 17

atomic number

Question 18

how to find number of protons

Answer 18

atomic number

Question 19

how to find number of neutrons

Answer 19

mass - atomic number

Question 20

gas to liquid state change name

Answer 20

condensing

Question 21

whats an ion

Answer 21

different number of protons and electrons and results in the atom having a charge

Question 22

number of electrons in F- (f has atomic number of 9)

Answer 22

10

Question 23

number of electrons f2+ (f has atomic number of 9)

Answer 23

7

Question 24

whats an isotope

Answer 24

same number of protons but different number of neutrons

Question 25

features of solids - particle model `

Answer 25

strong forces of attraction which holds particles close together in a fixed position in a definite shape and volume. the particles don't move around but vibrate and heat makes them vibrate more

Question 26

features of liquids - particle model

Answer 26

weak forces of attraction which allow particles to be free to move however still have a definite volume.an increase in heat results in an increase in movement

Question 27

features of gases - particle model

Answer 27

very weak forces of attraction, particles free to move, always fill a container. they have constant movement and random motion. an increase in heat causes an increased pressure

Question 28

disadv. of particle model

Answer 28

spheres don't correctly represent the particles which are atoms, molecules or ions. doesn't include detail about the forces, how strong and how many forces there are

Question 29

whats relative atomic mass

Answer 29

different isotopes have different masses. The relative atomic mass is the average mass of these isotopes.

Question 30

whats the formula for relative atomic mass

Answer 30

sum of (isotope abundance x isotope mass) / sum of abundance of all isotopes