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Density equals
Mass/volume
What is Matter?
Matter is anything that has mass and volume.
The atom is
the basic unit of matter
A molecule is
A neutral group of atoms held together by chemical bonds.
What are the physical states of matter
Solid, Liquid, Gas
What is a Homogenous Mixture?
a mixture containing substances that are uniformly distributed.
What is a Heterogenous Mixture?
a mixture containing substances that are NOT evenly distributed.
What is a molecule?
a single particle composed of two or more non-metal atoms.
What is a physical change?
A change that effects only physical properties of matter. You will have the same object in different forms.
What is a Chemical change?
a change that produces one or more new substances.
Ions are formed by gaining or losing ??
Electrons
Electron charge?
Negatively
The number of valance electrons can be determined by
adding the two highest "s" and "p"s.
Rows in the Periodic tables are called
Periods
Columns in the Periodic tables are called
Groups or Families
Ionization Energy is
the amount of energy needed to remove an electron from an atom.
The atom with the highest IE level on the periodic table
Hydrogen
When balancing an equation do the oxygen and hydrogen _
LAST
To balance an atomic equation start with the
most complex compound and work your way down so there are the same # of each element on each side.
One mole contains how many molecules?
6.02x10^23
These elements are diatomic...
Hydrogen, Nitrogen, Oxygen, Flourine, Chlorine, Bromine, Iodine
Ionic Compounds are usually
Metal + NonMetal
Meolecular compounds are usually
NonMetal
Monatomic Ions consist of..
A single atom
Elements that show the charge in roman numerals are found in the _ family
Transition Metals
A negatively charged ion is called an
Anion
Four things that are evidence of a Chemical Reaction
Temperature Change Gase Evolved Permanent Color Change Formation of a precipitate
What are the seven steps to balancing an equation
1. Check Diatomics 2. Balance the Metals 3. Balance the Nonmetals and polyatomics 4. Balance Oxygen 5. Balance Hydrogen 6. Reduce the co-efficients.
The first step to determine Empirical Formula
Turn the % to grams
Second Step to determine Empirical Formula
convert g to mol
Third Step to determine the Empirical Formula
/ all quantities by the smallest #
Fourth step to determine the Empirical Formula
Multiply until a whole number then write the formula. ex 1,1,4
Mono
1
di
2
tri
3
tetra
4
Group (Family)1
Alkali Metals
Group (Family)2
Alkaline Metals
Group (Family)3-12
Transition Metals
Group (Family)17/ 7A
Noble Gasses
Electron Configuration looks like
horizontal lines with up and down arrows representing electrons.
S has _ orbital(s)
2
p has _ orbital(s)
6
d has _ orbital(s)
10
f has _ orbital(s)
14
Electron Dot diagram shows only the
valence electrons
penta
5
hexa
6
hepta
7
octa
8
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