I believe that the answers are A and B.
The term coordinate number in ionic crystals refers to the number of oppositely charged ions surrounding a particular ion, I hope this was able to help you.
False it takes a while to feel the effects
Answer:
Im not sure of what you're asking but a few results of that could be
-dozing off in class
-more likely to get sick
-getting distracted
Explanation:
Answer:
Diaphragms
C. Create a physical and chemical barrier to sperm.
