Answer:
option A is the most supported hypothesis by astronomers
Answer:
A and C represent elements while B and D represent Compounds
Explanation:
chemical elements cannot be broken down into simpler substances by any chemical reaction. While A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds
No, isotopes are versions of elements, where as ions are atoms or molecules.
The answer is B
If one circuit fails, it is most likely that all the components in the circuit will fail.