What is the percent of carbon-14 remaining after two half-lives?

The p sub shell can hold up to 8 electrons in an atom. true or false?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+