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A substance composed of two or more different elements in fixed proportions is known as a(n) _____.

A chocolate chip cookie is an example of a(n) _____.

Radon-222 has _____ protons, _____ neutrons, and _____ electrons.

Which of these subatomic particles is not found in the nucleus of an atom?

When a strontium atom loses two electrons, it becomes a(n) _____ with a charge of _____.

What is the correct number of atoms in one mole of neon?

What is the mass in kilograms of a 25.00-pound dumbbell? (454 g = 1 pound)

Which family/group is largely unreactive?

Which of these statements best describes the formation of an anion?

Elements belonging to the same group have the same _____.