The outermost shell of an atom is known as

1. Valency
2. Valence electrons
3. Nucleus
4. Valence shell

The number of valence electrons present in magnesium is

1. two
2. three
3. four
4. five

If the atomic number of an atom is 17 and mass number is 35, then number of neutrons will be

1. 35
2. 17
3. 18
4. 52

The number of electrons in an atom is equal to the number of

1. protons in a neutral atom
2. neutrons in a neutral atom
3. nucleons in a neutral atom
4. none of the above