4. false
5. true
6.valence electrons
I took the test
Hope this helps.
Is this a multiple answer?
The answer is true
Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light.The wavelength decreases as the light enters the medium and the light wave changes direction.
Ca + Cl2 = CaCl₂
A synthesis <span>reaction.</span>