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18 Week Assessment


A molecule is ____________combined Chemically
Pure substance made up of more than one element combined Compound
Homogeneous Mixture Salt Water
Heterogeneous Mixture Concrete
Best mixed of all mixtures Solution
Shorthand way of representing the chemical elements Chemical Symbols
Solution of Metals Alloy
Description of a chemical reaction using symbols and formulas Equation
A solution is what type of mixture Homogeneous Mixture
A Substance that contains only one type of atom Element
A Substance made up of more that one kind of Molecule Mixture
In sweetened tea, the sugar is called the Solute
A substance that dissolves in water is Soluble
The water in salt water would be the Solvent
2H2 + O2 ----- 2 H2O What's the product Water
You increase solubility by increasing Temp
Smallest piece of matter was named "atom" by who Democritus / Greek
Whose model claimed matter is made of atoms, atoms of the same element are alike, atoms of different compounds are not alike Dalton's Model
Who discovered the Electron Thomson
Who was the first to discover the atom Greek / Democritus
Where did Bohr's model place electrons on orbits around the nucleus
The modern atomic model or present day theory is called Wave Mechanics
Positively Charges particle in the nucleus of an atom Proton
Number of protons in the nucleus of an atom is called the Atomic Number
Sum of protons and neutrons Atomic Mass
All neutrons are electrically Neutral
The nucleus of an atom contains Protons and Neutrons
Created by: huizenga

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