Composition of Matter Atom= building block of an element Smallest part of matter Protons= + charge Neutrons= 0 charge Electrons= -1 charge.
The Chemistry of Matter Abel’s Elements To Know. Quick Facts Atomic Number = number of protons Atomic Number = number of protons 298 K = room temperature.
Atomic Structure Section 3.1, p.70-76. Hydrogen Atomic number: 1 Name: Hydrogen Symbol: H Family: Nonmetals Commonly combines with itself to form a diatomic.
Composition of Matter
