start

Question 1

what do atoms consist of

Answer 1

protons neutrons and electrons

Question 2

what is the meaning of atomic number

Answer 2

number of protons

Question 3

what is the meaning of mass number

Answer 3

number of protons and neutrons

Question 4

what is an isotope

Answer 4

atoms with the same number of protons but different neutrons

Question 5

name the following compounds

H
N
O
Na
C
S

Answer 5

H- Hydrogen
N- Nitrogen
O - Oxygen
Na- Sodium
C- Carbon
S- Sulfur

Question 6

Electron configuration for
Soduim
Beryllium
Chlorine
Krypton
Potassium

Answer 6

Sodium- 2,8,1
Berylluim - 2,2
Chlorine- 2,8,7
Krypton- 2,8,8,8
potassuim- 2,8,8,1

Question 7

how many protons and neutrons in
Nitrogen
Helium
silicon
calcium
fluorine

Answer 7

Nitrogen - 7Protons 7 neutrons
Heluim- 2 protons and 2 neutrons
silicon- 14 protons and 14 neutrons
calcuim- 20 protons and 20 neutrons
fluorine - 9 protons and 10 neutrons

Question 8

what is period in the perdioc table

Answer 8

A period is a row in the periodic table and it tells you the number of shell sin the atom/element

Question 9

what is a group in the perdioc table

Answer 9

a group in the periodic table is a column representing elements with the same number of valance electrons