Question

Select all that apply to the organization of the periodic table.

The periodic table is arranged in alphabetical order.
The periodic table is arranged in order of increasing atomic number.
Properties of elements can be predicted from their placement on the table..
A horizontal row is called a period.
A vertical column is called a group.

Answer 1

• The periodic table is arranged in order of increasing atomic number.
• Properties of elements can be predicted from their placement.

These two options were used to organize the periodic table.

About other options

• A horizontal row is called a period.
• A vertical column is called a group.

These are also right but not used in organization of periodic table.

Answer 2

The periodic table is arranged in order of increasing atomic number.
Properties of elements can be predicted from their placement on the table..
A horizontal row is called a period.
A vertical column is called a group.