Question

identify the correct elements being described below: the alkaline earth metal with the greatest mass transition metal in period 4. the lightest noble gas. answer bank cu copper ra radium he helium

Explanation:

Step1: Recall alkaline - earth metals

Alkaline - earth metals are in group 2 of the periodic table. Ra (radium) is the heaviest among them in the answer bank.

Step2: Identify period 4 transition metals

Cu (copper) is a transition metal in period 4.

Step3: Determine the lightest noble gas

He (helium) is the lightest noble gas.

Answer:

1. Ra
2. Cu
3. He