An isotope of iron has 28 neutrons. if the atomic mass of the isotope is 54, how many protons does it have?
a. 26
b. 28
c. 54
d. 82

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

What happens when the temperature of a solution increases?