Question

The table below gives the numbers of protons, electrons, and neutrons in four atoms. Atom Number of protons Number of electrons Number of neutrons 1 39 39 52 2 40 40 50 3 39 39 54 4 40 40 51 Based on the information that is given, which atom in the table has the highest mass? 1 2 3 4

Answer 1

3

Explanation:

Add protons and neutrons.

Answer 2

3

Explanation:

As per table, the mass is:

• 1 | 39 + 39 + 52 = 130
• 2 | 40 + 40 + 50 = 130
• 3 | 39 + 39 + 54 = 132
• 4 | 40 + 40 + 51 = 131

So the atom 3 has the highest mas of 132

Answer choice 3 is correct