Question

The elements of the third period of the Periodic Table are given below

:

Which has a higher atomic mass, $Al$ or $Cl$?

Answer 1

Higher atomic mass $–$ $Al$ or $Cl$

1. The atomic mass of an element is the mass of one atom of that element.
2. On moving from left to right in a period, the atomic number increases and generally so does the atomic mass.
3. The atomic mass of $\mathrm{Al}$is $26.98\mathrm{amu}$ and the Atomic mass of $\mathrm{Cl}$ is $35.453\mathrm{amu}$.
4. Due to the elements being arranged in the increasing order of their atomic numbers in the periodic table. So, $Cl$ has a higher atomic mass than $Al$.