Approximately how old is the moon thought to be?
a. 1 billion years
b. 2.1 million years
c. 3.8 billion years
d. 4.5 billion years

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration