2 1.1 Matter has mass and volume. Matter – anything that has mass and takes up spaceMass – the amount of matter in an objectWeight – the downward pull of gravity on an object
3 1.1 Continued Volume – the amount of space an object takes up Examples of matter –Examples of non-matter –
4 1.2 Matter is made of atoms. Atom – smallest basic unit of matter Subatomic particles – smaller particles that make up an atom; protons, neutrons, and electronsNucleus – the center of the atom; contains protons and neutrons
5 1.2 ContinuedProton – a positively charged particle found in the nucleusNeutron – a particle found in the nucleus that has no chargeElectron – a negatively charged particle found outside the nucleus
7 1.2 Continued B. Molecule – when two or more atoms combine together 1. A molecule can be made by combining alike or different atoms.2. A molecule is the smallest amount of a substance made of combined atoms that is considered to be that substance.
8 Section 1.3 Pure substance – has only one type of substance Element – substance that contains only a single type of atomPeriodic table – organized list of the elements1. Mendeleev and Moseley were the two scientists who were involved in creating the modern periodic table.
9 1.3 ContinuedChemical Symbol – shorthand way of representing the elements; only one or two lettersAtomic number – number of protonsCompound – substance that consists of two or more different types of atoms bonded together
10 1.3 ContinuedMixture – combination of different substances that remain the same individual substances1. heterogeneous – have different properties in different areas2. homogeneous – evenly distributed; the same throughout
11 1.3 Continued Mixture Compound Substances Remain the same New substance formedSeparationBy physical meansBreaking bondsProportionsVaryFixed