Post on 17-Jan-2016
Unit 1 Sec 2.1
Nature and Composition of Matter
A. MATTER
1. Matter: anything that occupies space and has mass
a) Example:
2. Mass: quantity of matter an object hasa) Example:
B. ELEMENTS
1. Element: pure substance that cannot be broken down chemically into simpler kinds of matter
1. Example:
C. ATOMS
1. Atom: simplest particle of an element that retains all of the properties of that element
2. Nucleus contains:
a) Protons:
b) Neutrons:
1. Electrons:
a) Energy Levels:
D. COMPOUNDS
1. Compound: pure substance made up of atoms of 2 or more elements
Example:
2. Molecule:Example:
E. BONDS
1. Covalent bonds: 2 atoms share one or more pairs of electrons
E. IONIC BONDS
4. Ion: charged particleExample:
5. Ionic Bond:Example: