3.2.1 - particle numbers

Question 1

what is the relative mass of a proton

Answer 1

1

Question 2

what is the relative mass of a neutron

Answer 2

1

Question 3

what is the relative mass of an electron

Answer 3

0.0005

Question 4

what is the relative charge of a proton

Answer 4

+1

Question 5

what is the relative charge of a neutron

Answer 5

0

Question 6

what is the relative charge of an electron

Answer 6

-1

Question 7

where are protons and neutrons found within the atom?

Answer 7

the nucleus

Question 8

where are electrons found within the atom?

Answer 8

the shells

Question 9

what does the mass number show?

Answer 9

the total number of protons and neutrons

Question 10

what does the atomic number show?

Answer 10

the number of protons/electrons

Question 11

since atoms are neutral…

Answer 11

number of protons = number of electrons

Question 12

what are isotopes?

Answer 12

atoms with the same number of protons but different number of neutrons

Question 13

what is relative atomic mass (RAM)

Answer 13

the average mass of an atom of an element

Question 14

what 2 things are used to calculate RAM?

Answer 14

• mass numbers of each isotope
• their %-abundances in nature

Question 15

e.g calculate the RAM of chlorine

chlorine-35 | mass number - 35 | %abundance - 75

chlorine-37 | mass number - 37 | %abundance - 25

Answer 15

RAM = (75/100 x 35) + (25/100 x 37)