2. Atoms & Elements

Why are groups on the periodic table also referred to as families?

Which term is used to describe the vertical columns on the periodic table?

Why is the placement of hydrogen on the periodic table a subject of debate among scientists?

Which metal in period 5 of the periodic table is very reactive and has two valence electrons in each atom?

The green elements on the periodic table are commonly referred to as:

Which of the following elements is classified as an alkali metal?

Which of the following statements about groups in the periodic table is not true?

Which term is used to describe a column on the modern periodic table?

Which element, a member of the carbon family (Group 14), is commonly mistaken for the material at the end of a pencil?

Which group on the periodic table is considered the most reactive?

An element with the valence electron configuration 4s^2 4p^4 belongs to which period and group on the periodic table?

How many groups are present in the modern periodic table?

Why do elements in the same group of the periodic table have similar chemical characteristics?

Which group on the periodic table is considered the least reactive?

Which element has chemical properties most similar to sodium?