Question

____ atom is the smallest atom of all
a]Calcium
b]Chlorine
c]Hydrogen
d]Oxygen​

Answer 1

Answer:

Hydrogen

Explanation:

is the smallest atom...if this answer helps you plss mark as brainliest...

Answer 2

Hydrogen atom (option c) is the smallest atom of all the given atoms in the question.

• The distance between an atom's nucleus and the outermost shell, which contains electrons, is used to determine its size.

• With an increase in the number of electron-carrying shells, the atom's size grows as well.

• The atomic size and number of shells of atoms are:

1. Calcium: Outermost shell= Fourth shell ; Size= 0.197 nm
2. Chlorine: Outermost shell= Third shell ; Size= 0.175 nm
3. Hydrogen: Outermost Shell= First shell ; Size= 0.037 nm
4. Oxygen: Outermost Shell= Second shell ; Size= 0.073 nm

• Hence, from the above information, we can conclude that Hydrogen is the smallest atom from the other atoms.