changes of state + the particle model+atoms+isotopes

Question 1

what happens when we put energy in a system

Answer 1

solid into liquid(melting)

liquid into gas (evaporating)

Question 2

what happens when energy comes out of a system

Answer 2

gas into liquid ( condensing)

liquid into solid(freezing)

Question 3

what is the size of an atom in nanometers and meters

Answer 3

0.1-05nm and (1x10 to the power of -1) - (5x10 to the power of -10)m

Question 4

what is the mass of a proton

Answer 4

1

Question 5

what is the mass of a neutron

Answer 5

1

Question 6

what is the mass of an electron

Answer 6

1/2000

Question 7

what number is the mass number(on photo)

Answer 7

the larger number

Question 8

what is the atomic number(on photo)

Answer 8

the smaller number

Question 9

what is the mass number

Answer 9

the number of protons and neutrons

Question 10

what is the atomic number

Answer 10

the number of protons

electrons in an atom

Question 11

how do you find the number of neutrons(on photo)

Answer 11

mass number - atomic mass

Question 12

how do you find the number of protons(on photo)

Answer 12

atomic number

Question 13

what is an ion

Answer 13

an atom that has lost or gained electrons

Question 14

what is an isotope

Answer 14

atom that has different number of neutrons

Question 15

why has their been multiples changes to the model of the atom

Answer 15

due to new developments and new discoveries

Question 16

what is the order of people that developed the model of the atoms

Answer 16

ancient greece
dalton
thompson
rutherford
chadwick
bohr
quantum physics

Question 17

what did ancient greece believe

Answer 17

first discovered the atom

uncuttable

Question 18

what did dalton believe

Answer 18

1800s

solid sphere

Question 19

what did thompson believe

Answer 19

plum pudding model

Question 20

what did rutherford believe

Answer 20

ppm and worked out it has a solid centre

Question 21

what did bohr belive

Answer 21

the nucleur model of the atom that we use today

nulcues in the middle with shells

Question 22

what did chadwick belive

Answer 22

added neutrons after rutherford

Question 23

what was rutherfords gold foil experiment

Answer 23

took a sheet of gold foil
shot particles out of particle gun
majority of particles went straight through
ocasionally one deflected
ocasionally oe deflected back
-overall positive nucleus surrounded by negative charges around the outside, majority of atom was empty space
- this led to the nucleur model of the atom

Question 24

what are the three types of radiation

Answer 24

alpha(helium nuclei)
beta(electron)
gamma(part of electrogmagnetic spectrum)

Question 25

what is the symbol for alpha

Answer 25

4
fish
2

Question 26

what is the symbol for beta

Answer 26

0
e
-1

Question 27

what is the symbol for gamma

Answer 27

y

Question 28

put the three types of radiation in order of size

Answer 28

largest - alpha

           beta

smallest-gamma

Question 29

put the three types of radiation in order of ionising

Answer 29

highly ionising - alpha

                      beta

                      gamma

Question 30

put the three types of radiation in terms of penetration

Answer 30

highly penetrating - gamma
beta
alpha

Question 31

how to stop alpha radiatin

Answer 31

paper/skin

Question 32

hwo to stop bet radiation

Answer 32

foil

Question 33

how to stop gamma radiating

Answer 33

lead

Question 34

what can be used to measure radiation

Answer 34

geiger-muller tube

Question 35

what is the unit of radiation

Answer 35

becquerels (Bq)