1.2 basic ideas about atoms

Question 1

define mass number

Answer 1

mass number is the number of protons and the number of neutrons in the nucleus of an atom

Question 2

define the word isotopes

Answer 2

isotopes are atoms having the same number of protons but different number of neutrons

Question 3

what is a ion

Answer 3

ion is a particle where the number of electrons does not equal the number of protons

Question 4

what is the relative mass of a proton

Answer 4

1

Question 5

what is the relative charge of a proton

Answer 5

+1

Question 6

what is the relative mass a neutron

Answer 6

1

Question 7

what is the relative charge of a neutron

Answer 7

0

Question 8

what is the relative mass pf a electron

Answer 8

negligible(1/1840)

Question 9

what is the reelative charge of a electron

Answer 9

-1

Question 10

what is the penetrating power of alpha

Answer 10

thin paper

Question 11

what is the penetrating power of beta

Answer 11

aluminium

Question 12

what is the penatrating power of gamma

Answer 12

lead

Question 13

what is a alpha particle

Answer 13

alpha particle is a cluster of 2 protons and 2 neutrons theefore positivly charge ( helium nucules)

Question 14

what is a beta particle

Answer 14

beta particle is a fast moveing electron therefore negativly charged

Question 15

what is gamma ray

Answer 15

gamma rays are high energy electromagnetic radiation therefore no charge

Question 16

define atomic number

Answer 16

atomic number is the number of protons in the nucleus of an atom