Show:
Level Headed
Bond for Glory
Reactionary Views
Energy Policy
Grab Bag
100
It's a force that holds two or more atoms together in a compound.
What is a chemical bond?
100
It's a chemical bond formed when two atoms share one or more pairs of valence electron.
What is a covalent bond?
100
It's a process in which atoms of one or more substances rearrange to form one or more new substances.
What is a chemical reaction?
100
It's the minimum amount of energy needed to start a chemical reaction.
What is activation energy?
100
It's a number placed in front of an element symbol or chemical formula in an equation.
What is a coefficient?
200
It's a model that represents valence electrons in an atom as dots around the element’s chemical symbol.
What is an electron dot diagram?
200
It's the attraction between positively and negatively charged ions in an ionic compound.
What is an ionic bond?
200
It's a starting substance in a chemical reaction.
What is a reactant?
200
It's a chemical reaction that releases thermal energy.
What is exothermic?
200
It's a chemical reaction in which a substance combines with oxygen and releases energy.
What is combustion?
300
It's an outermost electron of an atom that participates in chemical bonding.
What is a valence electron?
300
It's a bond formed when many metal atoms share their pooled valence electrons.
What is a metallic bond?
300
It's a substance produced by a chemical reaction.
What is a product?
300
It's a chemical reaction that absorbs thermal energy.
What is endothermic?
300
It's a type of chemical reaction in which the negative ions in two compounds switch places, forming two new compounds.
What is double replacement?
400
It's a molecule that has a partial positive and a partial negative end because of unequal sharing of electrons.
What is a polar molecule?
400
It's a description of a reaction using element symbols and chemical formulas.
What is a chemical equation?
400
It's a type of chemical reaction in which two or more substances combine and form one compound.
What is synthesis?
400
It's a substance that increases reaction rate by lowering the activation energy of a reaction.
What is a catalyst?
400
It's a type of chemical reaction in which one element replaces another element in a compound.
What is single replacement?
500
It's a group of atoms held together by covalent bonding that acts as an independent unit.
What is a molecule?
500
It's a group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.
What is a chemical formula?
500
It's a type of chemical reaction in which one compound breaks down and forms two or more substances.
What is decomposition?
500
It's a catalyst that speeds up chemical reactions in living cells.
What is an enzyme?
500
It's a substance that slows, or even stops, a chemical reaction.
What is an inhibitor?