Alkali metals

Transition metals

Halogen

Noble gases

Alkali metals

Transition metals

Halogen

Noble gases

Li

Be

C

Ne

Protons, neutrons, and electrons all have about the same mass.

Unlike protons or neutrons, electrons have no mass.

Neutrons have no charge and no mass.

An electron has far less mass than either a proton or neutron.

Silicon (Si)

Germanium (Ge)

Carbon (C)

Argon (Ar)

mass number.

balanced charge

atomic number

isotope

mass number from atomic number

atomic number from mass number

atomic number from electron number

isotope number from atomic number

They do not have the same number of protons

their atoms have identical mass

they are isotopes of oxygen

they have the same mass number

periods go up and down and groups go across the table

groups go up and down and periods go across the table

periods go up and down and groups go up and down the table

periods go across the table and groups go across the table

carbon, iodine, tin

tin, copper, cesium

helium, iron, copper

iodine, carbon, argon

Silicon is a better conductor of electric current than silver is.

Silicon does not conduct electric current under any conditions.

Silicon's ability to conduct electric current does not vary with temperature.

Silicon is a better conductor of electric current than sulfur is.

most reactive metals.

most reactive nonmetals.

least reactive nonmetals.

least reactive metals.

increase

stays the same

increases then decreases

decreases

Test the density

Test the conductivity

Test the viscosity

Test the hardness