Periodic Table

Front

Which group of non-metals is the most reactive?

Back

Halogens (Group 17)

Front

What is each row in the periodic table called?

Back

Period

Front

What was Dmitri Mendeleev's greatest contribution to the periodic table?

Back

He predicted the existence (and properties) of new elements.

Front

Which element is not part of the Alkali Metal family?

Back

Hydrogen (H)

Front

What is the charge of a sodium ion?

Back

+1

Front

What are the vertical columns in the periodic table called?

Back

Groups or Families

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the periodic law?

Back

It states that the properties of elements are a periodic function of their atomic numbers.

Front

Which group contains the least reactive elements?

Back

Noble Gases (Group 18)

Front

What is the general trend of reactivity in alkali metals?

Back

Reactivity increases down the group.