<span>d. These elements make up most of the matter of the known universe</span>
Answer:
Last one
Explanation:
There always has to be evidence to back that up.
Answer:
All the noble gases have the full number of electrons in each layer.
Explanation:
For example, neon is a noble gas. The first layer of electrons is full since it contains the max amount of electrons which is 2. The next layer is also full, since it contains 8 electrons which is the max amount it can hold.
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Answer:
<em>they</em><em> </em><em>all </em><em>form</em><em> </em><em>diatomic </em><em>molecules.</em><em> </em>
<em>for</em><em> example</em><em>:</em><em> </em><em>H</em><em>2</em><em>,</em><em> </em><em>F2, Cl2, Br2, I2, and At2</em><em>)</em><em> </em><em>and they all form </em><em><u>negatively charged ions</u></em><em> H-, F-, Cl-, Br-, I-, and At</em><em>-</em><em> </em><em>.</em>
