periodic table

the number of protons in an atom classifies the___

atomic number

the sum of ___ and ___classifies the mass number

protons and neutrons

• good conductor

• malleable

• high density

• high melting and boiling point

• sea of electrons

metal

• poor conductor

• not malleable

• low density

• low melting and boiling point

non metals

• semi good conductor

• non malleable

• low density

• intermediate boiling and melting points

metalloids

• color,taste,odor less

• full valence shell

• low density

• not great conductors

• exceptionally low melting and boiling points

noble gases

for groups 1 and 2, 13-18, the elements have the ________ of valence elections, therefore _____ chemical properties

same, similar