Physical Science The Structure of Matter. What are compounds?. When two or more elements are chemically combined Ex)NaCl (sodium chloride) salt. Chemical bonds. Chemical bond- the attractive force that holds atoms or ions together Chemical bonds distinguish mixtures from compounds
(tells how they are oriented in space)
Table salt and sodium chloride in the form of regularly shaped crystals. Sodium chloride of crystals are cubed shaped.
Strong attractions between the oppositely charged ions caused the table salt and the other similar compounds to have high melting points and boiling points
Each grain of table salt is composed of a tightly packed network of Na+ ions and CI- ions
What is an Ion?
Ionic, Covalent, Hydrogen
Ionic bonds form by the transfer of electrons
Table salt= Sodium Chloride= Na+ and Cl-
together they form NaCl a neutral compound (no charge)
3 O would have a charge of –6 ( 3x –2)= -6
for 2 Fe to have a +6 charge, the Fe must have a 3+ charge