Which element has 7 valence electrons?

a nitrogen (N)

b neon (Ne)

c lithium (Li)

d chlorine (Ci)

How far from a concave mirror must an object be placed?

What of a wave is a measure of the energy it carries

What happens if actions taken during the fragmentation stage are only partially successful?

Which of the following has a mass of approximately one gram?

Epsilon Eridani is a star that is 10.5 light years away from Earth. One light year is about 9.46 trillion kilometers The distance between the star and Earth in kilometers is trillion kilometers?

A sound wave traveling at STP has a period of. 0023 seconds. The wavelength of this sound is closest to 1) 1.4E5 2) 6.9E-6 3) 0.76m 4) 76m

Static charge develops on a substance as it acquires or loses protons due to friction. a. True b. False

A milk truck carries milk with density 64.6 lb/ft3 in a horizontal cylindrical tank with diameter 12 ft. (a) Find the force exerted by the milk on one end of the tank when the tank is full. (Round your answer to the nearest integer.) lb

Which human activity contributes to air pollution

Cooler stars age much faster than hotter stars true or false