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Terms in this set (49)
what is the structure of the atom
where are protons, neutrons,and electrons located
>nucleus E-electron cloud
when you combine two elements that forms a
identify the four states of matter
describe the molecular motion of a solid ,liquid and gas
know which phase of matter has a definite volume and definite shape
know which phase of matter has definite volume and not a definite shape
know which of matter has no definite volume and no definite shape
Know what is physical prpoerties
physical properties only change form not identity.
know what is chemical properties
chemical properties change the entire identity of a substance .
know the difference between physical and chemical change
physical-change but not change identity
chemical- new substance
know the different phases of matter
freezing L>S release energy
boiling L>G add energy
evaporation L>G add energy
what is friction?
friction is a force that opposes or stops motion between two surfaces
what are the types of friction?
how does friction work?
push> force pushes in the opposite direction <
what affects the amount of friction ?
-texture of the two surfaces, the rougher the more friction
-mass of the object
what is force?
push or pull , can cause an object to speed up and is expressed in newtons.
what is balanced force?
not moving ,0 newtons, static -no movement
what is unbalanced force?
what causes unbalanced force?
push or pull
what is net force?
arrows are the same direction -you add
arrows in the opposite direction- subt
how do you find speed?
distance / time
what is the difference between speed and velocity?
speed= how fast you are moving
velocity = how fast you are going plus direction
what is acceleration?
change in velocity
what is positive acceleration?
increase in speed
what is negative acceleration?
decrease in speed
how are the periodic table arranged?
by increasing atomic number
what is the name of group 1?
what is the name of group 2?
alkaline earth metals
what is the name of group 3-12?
what is the name of group 13?
what are the name of group 14?
what is the name of group 15?
what is the name of group 16?
what is the name of group 17?
what is the name of group 18?
what way do groups or families go?
up and down ^
what way do periods go?
where are metals located?
to the left of the zigzag line
where are nonmetals located?
to the right of the zigzag line
where are metalloids located?
along the zigzag line
what are elements are metalloids?
what elements are liquids?
what elements are gases besides group 18?
what # is the same as protons and elements?
what # is the mass of the nucleus?
atomic number or mass number
what two subatomic particles can be found in the nucleus ?
protons & electrons
what group conducts heat and electricity?
If a magnitude of 10N and is directed toward the north. The other has a magnitude of 5N?
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