What does the number 84 in the name krypton-84 represent?

b. Atomic number

c. Mass number

d. Twice the number of protons

In parallelogram ABCD, what is DC? 3 in 9 in 13 in 19 in

Taste buds at the back of your tongue are most responsive to sweet. True False

What is 557.5 g : 0.86 mL

Calculate the distance Traveling at 5 m/s for 32 seconds

What is the conjugate base of h2so4?

Which of the following gases in Earth's atmosphere would you expect to find as molecules and which as individual atoms? a. Nitrogen b. Oxygen c. Argon

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as (1) an ionic compound (2) a molecular compound (3) a metal (4) a nonmetal

What is done with the reactive sodium after the reaction to make sure the products are safe in an air bag?

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?