The mass number of an element is equal to

a. the total number of electrons.

b. the sum of the protons and neutrons.

c. less than twice the atomic number.

d. a constant number for the lighter elements.

Which are the possible side lengths of a traingle?

The movement of food energy from one organism to another is called a

What element/compounds are used in the melting of ice?

Which of the following characteristics are true of enzymes? Check all that apply. The structure of an enzyme can change if conditions change.

In what kind of reaction do two or more substances combine to form a new compound? a. decomposition reaction c. double-displacement reaction b. ionic reaction d. synthesis reaction

How many moles of co2 could fit in a 475 ml bag at - 22c and 1.125 atm?

How mant atoms are in 3N2

The type of nuclear decay an unstable nucleus will undergo depends on its ratio of neutrons to protons. The radioisotope cobalt-65 has a ratio of neutrons to protons of 1.41, which is too high for a nucleus of this size.

1.87 $/gal to dollars per liter, Express your answer using three significant figures.

What can a student do to increase the force of attraction of a magnet on an iron block?