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33 Cards in this Set
- Front
- Back
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Symbol
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Begins with a capital letter. Stands for an element, but is a shorter way to write it. Oxygen's symbol is "O".
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Compound
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Two or more elements stuck together due to a chemical reaction.
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Organic Compound
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A compound (2 or more elements) where one of the elements is Carbon.
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Coefficient
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The large number in front of a molecule that tells you how many identical molecules you have. For example, 2 H2O would mean 2 molecules of water.
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Subscript
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The small number slightly below the writing line that shows you how many atoms of an element are contained in a molecule. If no number is written, it is understood that there is only 1 atom for that element.
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Molecule
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One group of atoms. This can be a compound, like H2O, or it can be a group of atoms of one element, such as O2.
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Formula, a.k.a Chemical Formula
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Like a recipe, it tells you what ingredients are in a compound.
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Law of Conservation of Mass, a.k.a. Law of Conservation of Matter
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States that in a chemical reaction, matter (or mass) in neither created nor destroyed. It is simply made into a new form.
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Element
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A specific type of substance, represented on the periodic table. The smallest piece of this is an atom.
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Balanced Equation
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When the number and types of atoms on one side of a chemical equation equal the number and types of atoms on the opposite side of the equation, even if they are rearranged.
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Metals
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Found on the left side of the periodic table.
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Non-metals
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Found mostly on the right side of the periodic table. The exception is Hydrogen.
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Metalloids
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Found along the staircase of the periodic table. These have some properties of metals and some properties of non-metals.
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Noble Gases
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Found in Group 18 on the periodic table, these elements are not very reactive. In fact, they are the least reactive.
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Periods
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The rows running left to right (horizontally) on the periodic table. There are 7 of them.
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Groups
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The columns running up and down (vertically) on the periodic table. There are 18 of them.
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Families
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This is another name for groups on the periodic table. They are called this because these elements behave like each other.
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Reactivity
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How much, or how little, one element is likely to have participate in a chemical reaction.
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Atomic #
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The number in the top of the box on the periodic table that tells you how many protons are in the element. This number also tells you how many electrons are in an element.
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Atomic Mass
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The number at the bottom of the box on the periodic table that tells you how many protons and neutrons (combined) are in the element.
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Number of Protons
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This is how the periodic table is organized, from least to greatest.
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Periodic Table
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A visual representation of all of the known elements. Each element gets one box to show that element's information.
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Protons
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The positively charged sub-atomic particles in an atom. They live in the nucleus.
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Neutrons
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The neutral (no charge) sub-atomic particles in an atom. They live in the nucleus.
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Electrons
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The negatively charged sub-atomic particles in an atom. They live in the electron clouds.
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APE
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An easy way to remember that Atomic # = Protons + Electrons
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MAN
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An easy way to remember that Mass - Atomic # = Neutrons
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Nucleus
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The center of an atom, where protons and neutrons live.
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Electron Clouds
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The outer rings, or shells, of energy of an atom. They swirl around the nucleus and electrons live there.
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First Ring
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You fill this ring first when drawing an atom model.
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2
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The maximum number of electrons the first electron cloud will hold.
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8
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The maximum number of electrons the second electron cloud will hold.
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18
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The maximum number of electrons the third electron cloud will hold.
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