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IS9 Finals Review (30 pts)

Dec. 12, Monday (Turn this in!)
Across
Protons plus neutrons
Cosmic microwave background
Measures distance from earth to star
Evidence for Big Bang
What force equals
Light moving away
Baby star in nebula
Group requiring one more electron to make Octet rule
Gives number of valence electrons
Increases left to right, bottom to top
Point closest to sun
What isotopes give to mass
Specifies how many shells an element has
Explains Kepler's first law
Planets orbit in an ellipse with the sun as one
Down
Most reactive metal
What a super massive stars becomes
Point farthest from sun
His laws describe planetary motion
Reactive, shiny elements
Metals with varying oxidation energies
Light moving closer
An object at rest stays at ___
What early lifeforms didn't need
Star fuel
Creates elements heavier than iron
Electrons on outermost shell
Varying number of neutrons
Increases right to left, top to bottom
Group containing most reactive elements
Gas with eight valence electrons