Atomic Structure

Atoms have same mass number but different atomic number
1. isotop
2. isobars
3. molecule
4. protons
The total number of proton and neutron present in atom is called
1. mass number
2. valency
3. atomic number
4. none
Combining capacity of an element is called
1. atomic number
2. mass number
3. valency
4. none
Mass number is represented by letter
1. A
2. Z
3. N
4. P
Mass number for fluorine is
1. 10
2. 9
3. 16
4. 19
Atomic number of iron is
1. 10
2. 20
3. 16
4. 26
Number of protons present in phosphorous
1. 10
2. 12
3. 15
4. 17
Symbol for oxygen
1. Ox
2. I
3. O
4. Y
Mass of helium is
1. 2
2. 4
3. 6
4. 8
Made up of two or more atoms
1. protons
2. neutrons
3. electrons
4. molecules