Answer:
atom is the answer I think
Hello!
Numbers from -998 and 999 are in between -999 and 1000.
I hope this was helpful! c:
I don’t know what exactly is but see at the picture.
Answer:

Explanation:
Combination reactions are the reactions in which two or more atoms/ molecules combine to give a single product.
Aluminum metal combines with iodine to given aluminium iodide.
Aluminium has a valency of 3 and iodine has valency of 1, so the formula is 
The reaction is shown below as:

Answer:
im not too smart, but i would say, either b or d
Explanation: