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Glossary of science iia- section 1
Created by koolkity22
- 1 amu
- 1/12 of a carbon-12 atom
- A chemical combination of two or more different elements is a(n)?
- compound.
- A chemical reaction that involves one or more substances changing into new substances?
- chemical change
- A heterogeneous mixture is like what?
- a sand-water mixture.
- A homogenous mixture is like what?
- a salt water mixture.
- A mixture is what?
- 2 substances combined.
- a substance that can not be separated into simpler sumbstances by physical or chemical means is a(n)?
- element
- alter w/o changing composition.
- physical changes.
- Atomic number =
- electrons = protons
- Atomic Number equals what?
- the number of protons.
- Calculated the mass of an electron
- Millikan
- Determined the mass to charge ratio of an electron
- Thomson
- How do you calculate the atomic mass of an element?
- you take the mass in amu's of both isotopes and individually multiply them by the percent abundance, then add them together.
- in isotope notation, how is it written?
- mass number on top, atomic number on bottom.
- Isotopes of an element have the same # of protons, but different numbers of what?
- neutrons.
- proposed the nuclear atomic model
- Rutherford
- separates by formation of solid, pure particles from a solution.
- crystallization.
- separates solids from liquids by using a porous barrier.
- filtration.
- separates substances on the basis of the boiling points of the substances.
- distillation.
- separates when a solid is formed.
- crystallization.
- Shows the relationship between the reactants and products in a chemical change.
- Chemical equation
