Answer:
in order:
Step-by-step explanation:
When the calcium atom loses electrons, it's charge increases by the number of electrons lost.
It loses 2 electrons, so it's charge increases by 2.
The answer is +2
Answer:
Below.
Step-by-step explanation:
This is a square based pyramid.
There are:
5 Faces (one on the base and 4 side faces)
8 edges. ( 4 on base and 4 on side)
5 vertices (4 on the base and one on the top)
Answer:
2x+3(10+x)
Step-by-step explanation:
I'm not sure but I think this might be the answer
