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3 Chemistry Assess
Review
| Question | Answer |
|---|---|
| A molecule is | chemically combined |
| An example of a homogeneous mixture is | salt water |
| An example of a heterogeneous mixture is | concrete |
| The “best mixed” of all mixtures is a | solutions |
| The smallest particle of an element that has the properties of that element is a(an) | atom |
| a shorthand way of representing the chemical elements | Chemical symbols |
| The description of a chemical reaction using symbols and formulas is called a chemical | equation |
| A substance that is made up of more than one kind of molecule is called is a (an) | mixture |
| In sweetened tea, the sugar is called the | solute |
| A substance that dissolves in water is said to be | soluble |
| Water in salt water would be the | solvent |
| To increase the solubility of sugar in water you would increase or decrease the temp | increase |
| Electron's Charge | Negative |
| Positively charged particle in the nucleus of an atom is the | Proton |
| Neutron's Charge | Neutral |
| The number of protons in the nucleus of an atom is called the | atomic number |
| The sum of protons and neutrons in the nucleus of an atom is called the | atomic mass |
| The nucleus of an atom contains | protons and neutrons |
| These forces explains that there is a force of attraction between all objects in nature. | gravity |
| These forces explain repulsion and attraction. | electromagnetic |
| These forces are responsible for radioactivity decay. | Weak |
| These force hold proton together. | Strong |
| The number at the top of each square in the periodic table is the (= number of protons) | Atomic Number |
| The horizontal rows of elements in the periodic table are | periods |
| The elements to the left of the stair like dark line on the periodic table | Metals |
| Elements within the same vertical column | Family |
| The elements in a period are arranged in order by | # of electron Valences |
| Elements in the same family of the periodic table have | similar properties |
| The two rows that stand alone at the bottom of the periodic table are | rare-earth elements |
| The periodic table is arranged by all the known elements in order of | increasing atomic number |
| Most of the elements on the periodic table are | metals |
| The noble gases are inactive because | their outermost energy level is full |
| In chemical combinations, non-metals tend to | gain electrons |
| Share the properties of Metals and Non-metals | Metalloids |
| Elements in Group 15 would have how many valences electrons? | 5 |
| Moving left to right on the periodic table the elements tend to | decrease in activity |
| Luster | Metal |
| Poor Conductors | Non-metal |
| Ductile / Malleable | Metal |
| Tend to rust or oxidize | Metals |
| Gain Electrons | Non-Metals |
| High Melting Point | Metals |
Created by:
huizenga
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