Be 1s²2s², [He]2s²
beryllium (2- second period, s² - 2A group)
Waxing crescent is the phase right after New moon.
The answer is C 4 3 4 3 hope it helps
Answer:
The balanced half reaction in an acidic medium is :

Explanation:

While balancing the half-reaction in an acidic medium, we will first balance oxygen atoms by adding water:
1) Adding 1 water molecule on product side to balance oxygen atoms.

Now balance hydrogen atom by adding
.
2) Adding 2 hydrogen ions on reactant side to balance hydrogen atoms.

Now balance the charge adding electrons on the side where positive charge is mor.
3) Adding 1 electrons on reactant side to balance charge of the overall reaction:

The balanced half reaction in an acidic medium is :

Answer:
Sawdust floats, sand dissolves, and 3rd dissolves