Question

1. what is the atomic number of barium? (3pts) 56 137 27 13 32) isotopes of an element always have the same (3pts) mass number. number of neutrons. number of subatomic particles. atomic number.

Explanation:

1. The atomic number of an element equals its number of protons, which is a fixed property of barium found on the periodic table.
2. Isotopes are variants of the same element, defined by having identical numbers of protons (atomic number) but different numbers of neutrons.

Answer:

1. $\boldsymbol{\square}$ 56
2. $\boldsymbol{\square}$ atomic number.