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35 Cards in this Set

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Atomic Number

The number of protons or electrons.

Atomic mass

The average mass off all of the isotopes.

Isotopes

An element with the same number of protons, but a different number of neutrons.

Element

A substance made up of only one kind of atom.

Compound

Different kinds of atoms chemically bonded together in fixed chemical proportions.

Fixed chemical proportions

Means that a compound always has the same atoms in it in the same ratio.

Period Number

Shell number is the same. (across the periodic table).

Group elements

Have the same electrons in the outer shell. (columns of periodic table).

Ions

Charged Atoms

Atomic size (Atomic radius)

Size decrease moving left to right across periodic table, even though there's still an increase in the number of protons, neutrons and electrons.

Ionization energy

Energy needed to remove one electron from an atom. (cation, positive ion).

Electronegativity

An atom's ability to attract (pull) electrons towards itself.

Configuration

How it's laid out. Refers to the number of electrons in an atom and how they are arranged.Electron configuration can be expressed in a diagram or as a series of numbers and commas.



Cation Ion

Positively charged

Anion

Negatively charged

Metals will donate electrons

Non-metals will gain electrons

Valency

Number of bonds an atom can make

Di

Two

Low electronegative

Easier to lose electrons


Exothermic reactions

Release heat energy

Endothermic Reactions

Heat energy is absorbed

Acids

Corrosive substances, react with solid substances.

Bases

Bitter taste, slippery,soapy,can be corrosive.

OH

Hydoxide

SO4

Sulfate

Co3

Carbonate

NO3

Nitrate

HSO3

Hydrogen Sulfate

HCO3

Hydrogen Carbonate

Hydroxide

Formed when Hydrogen and Oxygen bond together.

Hydrogen Carbonate

Formed when Hydrogen, Carbon and Oxygen bond together.

MONO

2

TRI

3

TETRA

4

PENTA

5