atomic structure

Question 1

what is the nucleus of an atom surrounded by

Answer 1

electrons that are arranged in shells

Question 2

what is the radius of an atom

Answer 2

1 x 10 -10 m

Question 3

what is the radius of a nucleus

Answer 3

1 x 10 -14 m

Question 4

what subatomic particles does the nucleus contain

Answer 4

protons and neutrons

Question 5

name the subatomic particles in an atom

Answer 5

protons
neutrons
electrons

Question 6

proton - relative mass

Answer 6

1

Question 7

proton - relative charge

Answer 7

+1

Question 8

neutron - relative mass

Answer 8

1

Question 9

neutron - relative charge

Answer 9

0

Question 10

electron - relative mass

Answer 10

less than 1

Question 11

electron - relative charge

Answer 11

-1

Question 12

what is the atomic number

Answer 12

number of protons

Question 13

what is the charge of a atom

Answer 13

atoms have no overall charge

Question 14

what is the mass number

Answer 14

total number of protons and neutrons

Question 15

what are isotopes

Answer 15

atoms of an element which have

• same number of protons
• different number of neutrons

Question 16

what is relative atomic mass

Answer 16

the average of the mass numbers of different isotopes

Question 17

how do you calculate the relative atomic mass

Answer 17

(mass no. of isotope 1 x abundance of 1) + (mass no f isotope 2 x abundance of 2) / 100