What is the mass, in grams, of a sample of 7.83 × 1024 atoms of helium (he)? show your work or explain the steps that you used to determine your answer.

Draw the lewis dot structure for each of the following polyatomic ions

The most common form of matter in the universe

How does a nuclear reactor produce electricity? a. high-energy gamma rays are converted by a generator into electricity. b. the heat from the reaction turns water to steam, which runs a generator. c. the reaction produces a stream of electrons that flow through wires and into batteries. d. the heat released from the reaction is used to burn coal or gas to produce electricity. e. control rods absorb the neutrons emitted and release a stream of electrons as electricity.