Question

Fill in the blanks:
1. An atom is the smallest unit of an element which takes part
in a _________.
2. The K-shell of any atom cannot have more than
_________ electrons.
3. An atom of an element has 11 protons 11 electrons and 12
neutrons. Atomic mass of atom is __________.
4. The number of neutrons in the neutrons in the neutrons of
an atom can be calculated by _______ the atomic number
of _______its mass number.
5. Synthetic elements are those which are prepared by
_________.​

Answer 1

Answer:

1) chemical reaction

2) 2 electrons

Answer 2

Answer:

1. chemical reaction
2. 2 electrons
3. 23