Atomic structure

Question 1

proton
neutron
electron

Answer 1

p - in nucleus - mass=1 - charge=+1
n - in nucleus - mass=1 - charge=0
e - orbitals - mass=1/1800 - charge=-1

Question 2

x LI
y

Answer 2

X = MASS NO (P+N)
Y = ATOMIC NO (PROTONS)

Question 3

Isotopes

Answer 3

atoms of same element with same number of protons but diff no on neutrons

Question 4

relative isotopic mass

Answer 4

mass of one isotope compared to 1/12 of one atom of carbon-12

Question 5

relative atomic mass

Answer 5

weighted mean mass of an isotope compared to 1/12 mass of one atom of carbon-12

Question 6

relative molecular mass

Answer 6

average mass of a molecule compared to 1/12 of an atom of carbon-12

Question 7

calculate R.A.M

Answer 7

{(isotope mass X % abundance) / 100

Question 8

ions charges

Answer 8

grp 1 = +1
grp2 = +2
grp3 = +3
grp 5 = -3
grp6 = -2
grp7 = -1