Atoms, Isotopes, Elements (6-8) (paper 1)

Question 1

what do atoms contain

Answer 1

• protons
• neutrons
• electrons

Question 2

what is the mass of a proton

Answer 2

1

Question 3

what is the mass of a neutron

Answer 3

1

Question 4

what is the mass of an electron

Answer 4

0.0005

Question 5

what are the two subatomic particles with the same mass

Answer 5

neurtron and proton

Question 6

what is the charge of a proton

Answer 6

+1

Question 7

what is the charge of a neutron

Answer 7

0

Question 8

what is the charge of an electron

Answer 8

-1

Question 9

where is the nucleus of an atom

Answer 9

in the middle

Question 10

what does a nucleus contain

Answer 10

• protons
• neutrons

Question 11

what is the charge of the nucleus and why

Answer 11

positive because of the protons

Question 12

where do electrons exist in an atom

Answer 12

on energy levels called shells

Question 13

what does the size of an eletrons orbitals determine

Answer 13

the size of the atom

Question 14

what are the two numbers of an atom

Answer 14

• atomic number
• mass number

Question 15

what does the atomic number tell you

Answer 15

how many protons there are

Question 16

what does the number of protons determine

Answer 16

the type of element

Question 17

what does the mass number tell you

Answer 17

the number of protons and nuetrons

Question 18

what is meant by the term isotope

Answer 18

isotopes are different atomic forms of the same element, which have the same number or protons but a different number of neutrons

Question 19

what is the equation for relative atomic mass

Answer 19

((mass of isotope 1 x percentage) + (mass of isotope 2 x percentage)) / 100

Question 20

what is an element

Answer 20

substance consisting of one type of atom only

Question 21

what is a compound

Answer 21

a substance which is made up of two or more different elements which are chemicallt bonded together

Question 22

is it easy to seperate a compound

Answer 22

no

Question 23

what is a mixture

Answer 23

two or more elements mixed together that are not chemically bonded

Question 24

is a mizture easy to seperate

Answer 24

yes

Question 25

is a mixture a pure substance

Answer 25

no

Question 26

what is the difference between a mixture and a compund

Answer 26

a compound is chemically bonded to another type of element, a mixture is not

Question 27

what is a pure substance

Answer 27

a substance made up of a single element or compound

Question 28

how can you tell if a substance is pure

Answer 28

it has a specific, sharp melting and boiling point