chemistry 2024

Question 1

what is an element?

Answer 1

a pure material made up of one type of atom

Question 2

what makes up a ‘thing’ and on what order?

Answer 2

1. subatomic particle
2. atom
3. particle
4. matter
5. material
6. object
   SAPMMO

Question 3

describe the relationship between elements and atoms

Answer 3

an element is a type of atom

Question 4

how many discovered elements are there currently in the universe

Answer 4

118

Question 5

name 5 objects smaller than atoms

Answer 5

1. gamma ray wavelength
2. uranium nucleus
3. electron
4. proton
5. neutron

Question 6

what are particles

Answer 6

small objects that make up materials

Question 7

what are atoms

Answer 7

the smallest whole particle making up matter

Question 8

what are atoms made of

Answer 8

subatomic particles

Question 9

what are examples of subatomic particles

Answer 9

protons neutrons and electrons

Question 10

what are radioactive atoms

Answer 10

atoms that release radiation

Question 11

what is radiation

Answer 11

a stream of energy or particles released from atoms that moves through space

Question 12

what is the periodic table

Answer 12

the organised array of chemical elements

Question 13

what is a proton

Answer 13

a subatomic particle with a positive electric charge

Question 14

what is a neutron

Answer 14

an uncharged subatomic particle

Question 15

what is an electron

Answer 15

a negatively charged subatomic particle

Question 16

what is alpha radiation

Answer 16

radiation made of alpha particles

Question 17

what is beta radiation

Answer 17

radiation made of beta particles

Question 18

what is gamma radiation

Answer 18

radiation made of gamma waves

Question 19

how is the periodic table organised

Answer 19

by number of protons in each element

Question 20

who invented the solid sphere model?

Answer 20

john dalton

Question 21

who invented the periodic table?

Answer 21

dmitri mendeleev

Question 22

who invented the planetary model?

Answer 22

niels bohr

Question 23

who invented the quantum model

Answer 23

erwin schrodinger

Question 24

who invented the plum pudding model

Answer 24

jj thomson

Question 25

who invented the nuclear model

Answer 25

ernest rutherford

Question 26

who invented the modern quantum model

Answer 26

james chadwick

Question 27

do atoms have mass?

Answer 27

yes

Question 28

what makes up atoms?

Answer 28

subatomic particles

Question 29

how do electrons behave in the nucleus?

Answer 29

they fly around the nucleus

Question 30

where are electrons in an atom?

Answer 30

around the nucleus

Question 31

what is the mass of a proton?

Answer 31

1 amu

Question 32

what is the mass of a neutron?

Answer 32

1 amu

Question 33

what is the mass of an electron?

Answer 33

0 amu

Question 34

how fast do electrons move in an atom?

Answer 34

the speed of light

Question 35

what holds nearly all the mass of an atom?

Answer 35

the nucleus

Question 36

what does a nucleus contain?

Answer 36

protons and neutrons

Question 37

how does the energy of an electron change if it is further away from the nucleus?

Answer 37

the energy is higher

Question 38

how does the energy of an electron change if it is closer to the nucleus?

Answer 38

the energy is lower

Question 39

how does the shell of an atom move?

Answer 39

orbits

Question 40

what holds protons together in a nucleus?

Answer 40

neutrons

Question 41

what does it mean when an atom is neutral?

Answer 41

it has the same number of protons as electron

Question 42

where is the nucleus of an atom?

Answer 42

the center of the atom

Question 43

why are some isotopes radioactive?

Answer 43

is there are too many or not enough neutrons, then a nucleus will be unstables, meaning that the atom is radioactive

Question 43

what are the different forms of radiation

Answer 43

particles or waves

Question 44

name the subatomic particles in the nucleus

Answer 44

protons and neutrons

Question 44

name the subatomic particles NOT in the nucleus

Answer 44

electrons

Question 44

describe the energy and danger level of alpha particles

Answer 44

low energy (not dangerous)

Question 45

describe the energy and danger level of beta particles

Answer 45

medium energy (can be dangerous)

Question 45

what is half life?

Answer 45

the time taken for half atoms to decay

Question 45

what are isotopes?

Answer 45

different forms of an element with more or less neutrons than each other

Question 45

describe the energy and danger level of gamma rays

Answer 45

high energy (dangerous)

Question 46

what is matter made of?

Answer 46

particles

Question 47

what do atoms make up?

Answer 47

all the matter in the universe

Question 48

what do subatomic particles make up?

Answer 48

atoms

Question 49

what are the 3 subatomic particles?

Answer 49

protons, neutrons and electrons

Question 50

which scientist first discovered the nucleus of atoms?

Answer 50

Ernest Rutherford

Question 51

Who describved the internal structure of an atom as being like a plum pudding?

Answer 51

JJ Thompson

Question 52

Define atomic nucleus

Answer 52

a positively charged region at the centre of the atom

Question 53

define electron shells

Answer 53

regions surrounding the atomic nucleus containing a specific number of electrons

Question 54

which subatomic particle is constantly in motion

Answer 54

electrons

Question 55

what makes an atom radioactive

Answer 55

if it has too many of not enough neutrons

Question 56

what is the mass number of a proton

Answer 56

1 amu

Question 57

what is the masss number of a neutron

Answer 57

1 amu

Question 58

what is the mass number of an electron

Answer 58

0 amu

Question 59

what is the charge of a proton

Answer 59

positive

Question 60

what is the charge of a neutron

Answer 60

neutral

Question 61

what is the charge of an electron

Answer 61

negative

Question 62

what is alpha radiation made of

Answer 62

alpha particles

Question 63

what is beta radiation made of

Answer 63

beta particles

Question 64

what is gamma radiation made of

Answer 64

gamma waves

Question 65

what material protects you from all types of radiation

Answer 65

lead

Question 66

what material protects you from beta and aplha but not gamma radiation

Answer 66

aliminium

Question 67

what material will protect you from alpha radiation but not beta or gamma

Answer 67

paper

Question 68

what is the chronological order of atomic models?

Answer 68

Solid Sphere model Periodic table Plum pudding model Nuclear Model Niels Bohr Quantum Model Modern Quantum model =spphhqm

Question 69

explain the key discovery of the periodic table

Answer 69

Dmitri Mendeleev discovered that elements have similar properties and repeat in cycles

Question 70

explain the key discovery of the solid sphere model

Answer 70

John Dalton discovered that atoms are tiny partcles that make up matter

Question 71

explain the key discovery of the plum pudding model

Answer 71

JJ Thomson discovered that atoms are made of small negatively charged particles called electrons

Question 72

explain the key discovery of the nuclear model

Answer 72

Ernest Rutherford discovered that atoms contain a nucleus but are mostly empty space

Question 73

explain the key discovery of the planetary model

Answer 73

Niels Bohr discovered that electrons orbit around a nucleus, and these orbits are called shells

Question 74

explain the key discovery of the quantum model

Answer 74

Erwin Schrodinger discovered that it is impossible to know an electrons prosition, istead think of a 'cloud' of electrons

Question 75

explain the key discovery of the modern quantum model

Answer 75

James Chadwick discovered that there are also neutral particles in an atomic nucleus, called neutrons