An atom that has gained or lost one or more electrons
What is Ion
100
A covalent bond in which atoms share one pair of electrons.
What is Single Bond
200
The simplest pure substances.
What is Elements
200
Scientist who performed the Gold Foil Experiment in which he concluded that atoms had a dense central region called the nucleus.
What is Ernest Rutherford
200
Russian chemist who is given credit for constructing the first periodic table
What is Dmitri Mendeleev
200
Name given to negatively charged ions
What is Anion
200
This value is used to determine which type of bond will form between two atoms
What is Electronegativity
300
Living things are made up of primarily these four elements
What is Hydrogen, Oxygen, Carbon, Nitrogen
300
Scientist who proposed the plum-pudding model of the atom
What is J.J. Thomson
300
This category of elements makes up most of the periodic table
What is Metals
300
Chemical formula for copper(II) chloride
What is CuCl2
300
Electrons are shared equally in this type of bond.
What is Non-Polar
400
Two or more elements chemically combined together.
What is Compound
400
The number of particles in exactly 1 mole of a pure substance.
What is Avogadro's Constant
400
This English chemist arranged the first 16 known elements in order of increasing atomic mass.
What is John Newlands
400
An ionic compound composed of ions bonded together and arranged in a 3-dimensional pattern.
What is Salt
400
This term refers to molecules that have opposite ends (positive and negative) due to the unequal sharing of electrons
What is Polar
500
A reaction that "gives off" or releases energy.
What is Exothermic
500
This law states that a given compound contains the same elements in exactly the same proportions by mass, regardless of the size of the sample or the source of the compound.
What is Law of Definite Proportions
500
The two problems with Mendeleev's Periodic Table
What is There were gaps in his table and the elements were not arranged according to atomic number.
500
An electrically-charged group of two or more chemically-bonded atoms that function as a single ion.
What is Polyatomic Ion
500
If the central atom of a molecule has four bonds with no unshared pairs of electrons, then it will have this shape.