1. Atom & Elements Notes
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2. Atoms & Elements notes
Atoms: building blocks of all elements. Made from protons, neutrons, electrons. Different combinations of protons, neutrons, electrons make different elements.

3. Molecule: atoms don’t travel alone! 2 or more atoms bonded together
Example: H2O= water molecule

4. Element: the periodic table has 118 known elements. 92 occur naturally.
Examples:
H= Hydrogen
Fe= Iron
O= Oxygen

5. Matter Has mass= kg, g measured on a scale
Takes up space= volume (length x width x height)
Always moving, made of tiny particles we can’t see (atoms and molecules)
ALL matter on Earth is made up of the elements in the periodic table