Periodic Table

Front

Elements in the same group or family have _____________.

Back

the same number of valence electrons and similar properties.

Front

Which class of elements are malleable, ductile, shiny when clean and polished, good conductors of heat and electricity, and reacts with acids to form hydrogen gas?

Back

metals

Front

Which element has the smallest atomic radius?

Back

argon

Front

What is the name of the elements that are unreactive and have a full octet?

Back

Noble Gases

Front

What is the trend for ionization energy?

Back

Across a period (left to right) it increases and down a group it decreases.

Front

What are the vertical columns in the periodic table called?

Back

Groups or families.

Front

What are the horizontal rows in the periodic table called?

Back

Periods.

Front

What is the significance of the atomic number of an element?

Back

It represents the number of protons in the nucleus of an atom.

Front

What are alkali metals?

Back

They are the elements in Group 1 of the periodic table, highly reactive and have one valence electron.

Front

What are halogens?

Back

They are the elements in Group 17 of the periodic table, known for being highly reactive nonmetals.