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

b. Atomic number

c. Mass number

d. Twice the number of protons

What best explains how two oxygen atoms, each with six valence electrons, can bond with each other? One atom can lose two electrons so that the other atom can gain them and have eight valence electrons.

If the half-life of carbon-14 is 6000 years, how many grams of carbon-14 should remain if a 72-gram sample sits around for 18,000 years?

If the total mass of the products of a reaction is less than the mass of the reactants, what must be true? A nuclear reaction has taken place. A chemical reaction has taken place. Nuclear fusion has occurred. Nuclear fission has occurred.

Which two particles re most similar in mass?

Which ion in each of the following pairs would you expect to be more strongly hydrated Why? ClO4 - or SO4-

Which statement correspond to a cellular respiration

A tire is filled to a gauge pressure of 2 atm at 27 degrees Celsius after a drive the temperature within the tire rises to 47 degrees celsius. What is the pressure within the tire now

What mass, in grams, of fluorine has (F2) is contained in a 10.3-liter tank at 29.8 degrees Celsius and 1.23 atmospheres? Show all of the work used to solve this problem.

What is the empirical formula of a substance that contains 2.64g of C, 0.444g H and 3.52g of O

Which of the following is a step in the conversion of 2.5 hm3 to L? fraction cubed: one cm over ten to the second power m fraction cubed: one hm over ten to the negative 2 power m ten to the negative third power L over 1 mL fraction cubed: one ml