Matter and Atoms PS2b

Note Organizer Types of Matter 3 fold paper Headers of Element…. Compound …. Mixture

Matter Has mass and volume (takes up space) Simplest whole piece of matter is the Element - atom

Atom – 3 parts Electron Neutron Proton

Has positive charge Is in the nucleus Has mass

Neutron No charge Is in the nucleus Has mass

Electron Negative charge Has almost no mass

The Atom

Elements Pure Only one type of atom About a hundred (92) Periodic table

Element ID Symbol Atomic Number – the number of protons in the nucleus Mass number – its “weight”. Mass of neutrons and protons

Compounds Atoms will come together and bond at the molecular level – form molecules Share electrons

Compound Atoms linked at the molecular level Different properties than parent elements Na + Cl = NaCl Are in precise proportion

Salt

Molecule The simplest part of a compound is a molecule. If you break up a molecule it will go back into its parent elements

Water Molecule

Mixtures Combinations of elements or compounds that do not bond Can be in any proportion Alloys – metal mixtures (bronze) Examples -Salt water, cool aid