What does the number 7 mean in the following example-73Li? a. The number of protons
b. The atomic mass
c. The atomic number
d. The number of electrons

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Which of the following units is not an official si unit? mole liter kilogram ampere