Which of these elements contains four

valence electrons?

F Helium

G Beryllium

A Carbon

J Oxygen

a gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressute of 2.1 atm. what is he partial pressure of gas Y?

How are oxidation number element and electrons related?

Nitrogen is a group 15 element. What does being in this group imply about the structure of the nitrogen atom? A. Nitrogen has 15 valence electrons. B. Nitrogen has 15 neutrons. C. Nitrogen has 5 valence electrons. D. Nitrogen has 5 neutrons.

A given mass of oxygen at room temperature occupies a volume of 500.0 ml at 1.50 atm pressure. what pressure must be applied to compress the gas to a volume of only 150.0 ml? answer

What element has a shorthand configuration of [He]2s^22p^1

You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." the soy milk is most likely a

What kinds of elements form an ionic bond?

Two atoms must represent the same element if they both have the same:

Calculate the number of oxygen atoms in 0.0073g of CaSO4 2. H2O?

What are the physical properties of toothpaste