The elements highlighted in blue are

Each column in the periodic table is called a

Elements which are shiny and conduct electricity/heat are

Which element is a halogen?

The atoms along the "stairstep" line are

In the modern periodic table, Moseley arranged the elements by

Which element is a noble gas?

Mendeleev's periodic table was arranged by

Which element is an alkaline-earth metal?

Elements in the same group or family have similar

Each row in the periodic table is called a