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
Answer:
i only know 6 whitch is the +ion
Explanation:
Answer:
C. because the 4s orbital is at a lower energy level
