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how many significant figures?
1) 0.00002453mm
2) 1100ft
3)2.334x10^5 | 1) 4
2) 2
3) 4 |
q | energy |
m | mass |
TriangleT | change in temp. |
Endothermic | Process absorbs energy |
Heat is always transferred from _____ objects to _____ cooler objects. | warmer
cooler |
Scientific Notation
123 000 000 | 123 x 10^6 |
H2 N2 O2 examples of what? | Diatomic Elements |
OJ with pulp in oil and water is example of what kind of mixture? | Heterogeneous |
The _______ _________ is a factor that's intentionally varied by the experimenter. | independant variable |
6 classifications of matter | solid liquid gas compound mixture element |
A ____ has a fixed volume and shape that result from the way their particles are arranged. | Solid |
Basic SI unit for amount of substance. | Mole |
_____ are pure substances that are only made up of one type of atom. | Element |
2 types of pure substance | element and compound |
Chemical compounds always contains the same element in exactly the same proportions by weight and mass? | law of DP |
Law that states the closer 2 charges are the greater the force. | Coulomb's |
Who created law of octaves? | John Newlands |
How did Medeleev organize elements | increasing atomic mass |
How did Moseley organize elements | increasing atomic # |
define periodic law | states how elements are arranged according to their atomic # |
which family has the most stable elements. why? | noble gas because they have full set of valence electrons. |
elements are mainly what? | metals |
what are the properties of metals? | good conductor of heat and electricity ductile malleable chemical properties shiny |
list the 11 families | hydrogen alkali/earth metals
transition
boron
carbon
nitrogen
oxygen
halogen
noble
rare earth |