Question

the table below gives information about the nucleus of each of four atoms. nuclei of four atoms atom number of protons number of neutrons 1 6 6 2 6 7 3 7 7 4 7 8 how many different elements are represented by the nuclei in the table? 1 2 3 4

Explanation:

Step1: Recall element - defining property

The number of protons in an atom's nucleus defines the element.

Step2: Identify unique proton numbers

Atom 1 and 2 have 6 protons (same element, carbon). Atom 3 and 4 have 7 protons (same element, nitrogen).

Answer:

2