What does the atomic mass of an atom tell us?
O How much the atom weighs
The number of electrons in the atom
Which row the element is in on the periodic table
The number of energy levels in the atom

The atomic mass of an atom tells us about how much the atom weighs.

Option A

Step-by-step explanation:

The atomic mass of an atom tells us about the weight of the atoms. An atom can be represented using the mass number denoted as A and atomic number denoted by Z. As atomic number is the number of protons present in the atom, mass number denotes the sum of protons and neutrons present in the atom.

So, the mass number will be approximately equal to the atomic mass. It can be also stated that atomic mass represents the weight of the atoms. The elements are arranged in the increasing order of their atomic mass in the periodic table.

true

step-by-step explanation: