how do you find avg atomic mass
(abundance % into dec x mass) + (abundance % into dec x mass)
order of electromagnetic spectrum
radio-->microwave-->infared-->visible-->UV-->xray-->gamma ray
Physical Changes in Matter
shape or size without changing the molecular structure. it can be reversed.
chemical change (chemical reaction)
a substance is transformed into a chemically different substance
physical properties of matter
Color, Odor, Shape, Hardness, Texture, Density, Volume, Mass, Weight
Chemical Properties of Matter
ability to burn, ability to rust, ability to decompose
where is electronegativity highest
top right ( increases more as you go to the upper right)
solid to liquid
melting
liquid to solid
freezing
liquid to gas
vaporizing/evaporation
gas to liquid
condensation
solid to gas
sublimation
gas to solid
deposition
how do you find number of valence electrons
Look at the group (column) number
Where are metals located on the periodic table?
left of staircase
Where are semimetals/metalloids on the periodic table?
the staircase
Where are non metals located on the table?
right of the staircase
what is the name of group 1
alkali metals
what is the name of group 17
Halogen Family
what is the name of group 2
alkaline earth metals
what is the name of group 18
Noble gases
what is a group
A column on the periodic table
what is a period
horizontal row in the periodic table
what's the maximum number of electrons that the 4th principle energy level can hold?
32 electrons
how many electrons does the s block hold
2
how many electrons does the p block hold
6
how many electrons does the d block hold
10
how many electrons does the f block hold
14
how do you find the amount of neutrons an element has
subtract attomic number from weight
how do you find how many protons an element has
atomic number
also the same for electrons
what are the 3 properties of a wave
wavelength, frequency, energy
name for group 3-12
transition metals
Do noble gases have electronegativity?
no
What element has the highest electronegativity?
Fluorine
ionization energy trend
increases up and to the right
atomic radius trend
increases down and to the left
electronegativity trend
increases up and to the right
how many electrons do columns 3-12 have
2
forming ions of metals
lose an electron, they become positive
forming ions of nonmetals
gain electron, become negative