Answer:
As the atomic number is equal to number of protons in an atom , so the atom having 15 electons has atomic number 15.
Explanation:
<h2>
FAULT</h2>
The principle of cross-cutting relationships states that a fault or intrusion is younger than the rocks that it cuts. The fault labeled 'E' cuts through all three sedimentary rock layers (A, B, and C) and also cuts through the intrusion (D). So the fault must be the youngest formation that is seen.
<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em>
The answer is: The addition of a small dense nucleus at the center of the atom.
That's false. It's the other way around. One light year is a distance that's a little farther than 63,000 astronomical units.