Physics help..What is a Compound?

1. Compounds
Atoms join together to make Compounds
1.When different elements react,atoms form chemical bonds with other atoms to form
compounds.
It’s usually difficult to separate the two original elements out again.
2.Making bonds involves atoms giving away,taking or sharing electrons.Onlythe
electrons are involved - it’s nothing to do with the nuclei of the atoms at all.
3.A compound which is formed from a metal and a nonmetal consists of ions.The metal
atoms lose electrons to form positive ions and the nonmetal gains electrons to form
negative ions.The opposite charges (positive and negative) of the ions mean that they’re
strongly attracted to each other.This is called IONIC bonding.
4.A compound formed from nonmetals consists of molecules.Each atom shares an
electron with another atom-this is called a COVALENT bond.Each atom has to make
enough covalent bonds to fill up their outer shell.
5.The properties of a compound are totally different fromthe properties of the original
elements. For example,if iron (a nice yellow powder) react ( a