Periodic Table (Group Presentations)

A French chemist who arranged elements by atomic weight and made a chemistry textbook in 1789

• Lavoisier

• Mendeleev

• Meyer

• Moseley

Henry Moseley arranged the elements in his periodic table the way we have them today, by

• atomic mass

• alphabetically

• color

• atomic number

The Periodic Law states that "the physical and chemical properties of elements recur in a systematic and predictable way when the elements are arranged in order of increasing __________ ____________."

• atomic mass

• atomic number

• size number

• ionic radius

Elements that are shiny, soft, highly reactive, and form +1 cations are

• alkali metals

• alkaline earth metals

• halogens

• noble gases

The group 1 elements (excluding Hydrogen) are

• halogens

• transition metals

• alkali metals

• alkaline earth metals

The most reactive alkali metal is

• Li

• Na

• Rb

• Fr

Group 8A elements, including He, Ne, Ar, Xe, Rn, are the

• alkaline earth metals

• lanthanides

• noble gases

• alkali metals

Noble gases are inert. This means they are

• nonreactive

• highly reactive

• sometimes reactive

The valence configuration of noble gases is

• s²p¹

• s²p⁴

• s²p⁵

• s²p⁶

A noble gas that is radioactive and can be used in radiation therapy to treat cancer is

• Ne

• Xe

• Ar

• Rn