Question

The atomic number of some elements is given as $10,20,7,$and$14$. Identify the elements.

Answer 1

Atomic number:

1. Atomic number is equivalent to the number of protons present in the nucleus of each atom of that element that is also equal to number of electrons.
2. The chemical elements can be uniquely identified by their atomic number.
3. The atomic number and the number of electrons are both equal in a regular, uncharged atom.

Neon:

1. The element having an atomic number $10$ will have $10$ electrons present in it.
2. Neon is the element with an atomic number$10$.
3. It is a colorless, odorless noble gas.

Calcium:

1. The element having an atomic number $20$ will have $20$ electrons present in it.
2. Calcium is the element having an atomic number$20$.
3. It is an alkaline earth metal that is reactive when exposed to air.

Nitrogen:

1. The element having an atomic number $7$ will have $7$ electrons present in it.
2. Nitrogen is the element having an atomic number $7$
3. It is a non-metal and lightest member in group$15$.

Silicon:

1. The element having an atomic number $14$ will have $14$ electrons present in it.
2. Silicon is the element having an atomic number $14$
3. It is a crystalline hard metalloid and semiconductor.

Therefore, the elements with $10,20,7,$and$14$ are Neon, Calcium, Nitrogen, and Silicon.