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Science semester 2 chapter 18

Terms in this set (46)

Chemical Formula
shows the elements in the compound and the ratio of atoms
Chemical Bond
the force that holds two atoms together
Ion
An atom or group of atoms that has a positive or negative charges
ionic bond
the attraction between oppositely charged ions
covalent bond
A chemical bond formed when two atoms share electrons
Molecule
A group of atoms bonded together
nonpolar bond
a covalent bond in which electrons are shared equally
polar bond
a covalent bond between atoms in which the electrons are shared unequally
polar molecule
A molecule that has electrically charged areas.
nonpolar molecule
molecule that shares electrons equally and does not have oppositely charged ends
Oxidation Number
Positive or negative number that indicates how many electrons an atom has gained, lost, or shared to become stable
Binary Compound
a compound composed of two elements
polyatomic ion
A charged group of covalently bonded atoms
Hyrate
is a compound that has water chemically attached to its atoms and written into its chemical formula
Character
Ionic Compounds Covalent Compounds
How the compound is formed
Atoms Gain electrons are shared
Smallest Particle
ions molecule
Usual State at room temperature
Solid Liquid and Gas
How many periods are on the periodic table?
7
How many groups are on the periodic table?
18
Question-What is the positive ion and its charge?
Answer-All metals have a oxidation number and it has no charge
Question-What is the negative ion and its charge
Answer-Nonmetals and its charge usually have no charge but with an exception of Hydrogen sometimes
Question-Balance the Charges to make the compound Neutral
Answer-The sign without is usually a superscript and it reduces the ratio of ions
Element

Sodium
Chlorine
Oxidation Number Positive or Negative
Charge

+1 Positive
-1 Negative
Ionic
The attraction of ions
Both
Neutral charge
Covalent
More than 1 or 2 electrons that are involved
Hetero means what?
different
Homo means what?
same
mono
1
di
2
tri
3
tetra
4
penta
5
hexa
6
hepta
7
octa
8
oxygen=
oxide
Phosphorus=
posphide
nitrogen=
nitride
sulfur=
sulfide
False
the properties of a chemical compound are the same as the properties of each element in it contains
True
an atom can gain or lose electrons in its outer shell
oxidation number of group 18
0
oxidation number of group 17
1-
oxidation number of group 16
2-
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