Nature and Composition of Matter Unit 1 Sec 2.1 Nature and Composition of Matter

A. MATTER Matter: anything that occupies space and has mass Example: Mass: quantity of matter an object has

B. ELEMENTS Element: pure substance that cannot be broken down chemically into simpler kinds of matter Example:

C. ATOMS Atom: simplest particle of an element that retains all of the properties of that element Nucleus contains: Protons: Neutrons: Electrons: Energy Levels:

D. COMPOUNDS Compound: pure substance made up of atoms of 2 or more elements Example: Molecule:

E. BONDS Covalent bonds: 2 atoms share one or more pairs of electrons

E. IONIC BONDS Ion: charged particle Example: Ionic Bond: