Question

the number of neutrons
the group number
question 8
what information can you find in the atomic mass of an element?
the elements location on the periodic table
how fast the atom moves in space
the total number of protons and neutrons in the atom
only the number of electrons in the atom
question 9

Explanation:

The atomic mass of an element is calculated as the sum of the number of protons and neutrons in an atom of that element. The element's location on the periodic table is determined by its atomic number (number of protons), not atomic mass. The speed of an atom's movement in space is not related to atomic mass. And the number of electrons (in a neutral atom, equal to the number of protons) is related to atomic number, not atomic mass.

Answer:

The total number of protons and neutrons in the atom