A helium atom has 2 protons and 2 neutrons. what is the mass number of this atom?

Which element is classified as a nonmetal? (1) Be (3) Si (2) Al (4) Cl

What energy form is a bow and arrow?

What is some difference between a galvanometer and an electric motor?

Which statement would be the most useful for deriving the ideal gas laws?

If the density of nitrogen gas at a certain pressure and temperature is 1.20 g/l, how many moles of nitrogen gas are in 15.0 l

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin

Which fossil fuel is the most widely consumed in the United States? A. petroleum B. natural gas C. peat D. coal

Why is the use of natural gas as a full becoming more common

A swimming-pool worker wants the pool's pH to be 7.2. She comes by to test the water and finds that the pH is 9.2. What should she do to correct this situation? A. Add water. B. Add base. C. Add acid. D. Do nothing.

What type of rock is sandstone