Chemistry Review II
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Catalyst | A substance that speeds up a chemical reaction by reducing the activation energy needed.
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| Reactants | The substances on the left side of a chemical equation
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| Nucleus | The part of the atom that gives it its mass
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| Ductile | Metals can be drawn into thin wires because they are ______
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| Metals | Elements to the left of the zigzag line on the Periodic table
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| Hydrogen | there are 2 atoms of ____ in a molecule of water
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| Compound | Two or more different elements chemically bonded
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| Malleable | Metals can be hammered into thin sheets because they are ___
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| Positive | A nucleus has this type of charge
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| Yields | The arrow in a chemical equation
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| Water | A surprising byproduct of a burning candle
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| Molecule | 2 or more atoms chemically bonded
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| Balanced | A chemical equation with the same atoms before and after the reaction
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| Homogeneous | A mixture that appears to be just one substance
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| Subscript | A # that cannot be changed when balancing chemical equations
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| Endothermic | A reaction in which heat energy is drawn in
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| Precipitate | A solid that forms out of 2 liquids reacting
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| Isotope | Atoms of the same element with different #'s of neutrons
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| Family | Elements found in a column on the Periodic table
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| Alkali Metals | The family with the most highly active solids
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| Proton | What is the positive subatomic part of an atom
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| Neutral | What type of charge does a neutron have?
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| Matter | A word that refers to all the substance in the universe
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| Sodium | A deadly element that is a part of the salt molecule
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| Coefficients | The numbers that can be changed to balance a chemical equation
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| Valence | The # of electrons on the outer energy shell of an atom
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| Chemical Reaction | Something that must happen to form a compound
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| Metalloids | Elements that have properties of both metals and non metals
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| Period | Elements who’s atoms all have the same # of energy rings
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| Molecule | At least 2 atoms chemically bonded
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| Periodic | Something with a regular repeating pattern is also called __________
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| Democritus | The first person to propose the idea of the atom
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| Rutherford | His experiment showed that atoms are mostly empty space
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| Thomson | His experiment gave evidence of electrons
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| Mixture | 2 or more substances mixed but not chemically bonded
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| NobleGases | Elements in family 18 are called _________
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| Transmutation | When an atom decays and becomes another element
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| Halflife | The amount of time it takes half of a radioactive sample to decay
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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