Answer:
Hydrogen(H) and Heluim(He)
Explanation:
These are the only two valennce electrons and 1 energy levels.
Answer:

Explanation:
Comparing to the solution consisting a pH of 5 containing
of hydrogen ions, a solution having a pH of 6 consists of
of hydrogen ions. A solution having a pH of 7 too will have a pH of
.
Answer:
2 8 8 2 is a correct answer
Answer:
Last Quarter also called Third Quarter.
Explanation:
Answer:
The answer to your question is D. 25 grams.