Intro to the Periodic Table

Mendeleev arranged the known chemical elements in a table according to increasing:

• atomic number

• mass

• number of protons

• number of electrons

The usefulness of Mendeleev's periodic table was confirmed by:

• the discovery of subatomic particles

• the discovery of the nucleus

• its immediate acceptance by other scientists

• the discovery of elements with predicted properties

The horizontal rows on the periodic table are called

• groups

• families

• periods

• metals

The vertical columns on the periodic table are called

• periods

• groups

• families

• groups or families

As you move from left to right across a row, what increases by exactly one?

• atomic mass

• isotope number

• atomic number

• atomic mass unit

The standard on which the atomic mass unit is based is the mass of a

• proton

• neutron

• carbon-12 atom

• chlorine-35 atom

The weighted average of the masses of an element's isotopes (decimal on periodic table) is

• atomic number

• atomic mass

• isotope number

• atomic mass unit

One twelfth of the mass of a carbon-12 atom is defined as a(n)

• atomic number

• atomic mass

• atomic mass unit

• mass number

Metals are located where on the periodic table

• left side

• upper right corner

• on zig zag line

• all over the place mixed with nonmetals

Which is not a property of metals?

• conductors of electric current

• ductile

• malleable

• brittle