Sage-Tips

How do you find the group and period?

Summary

1. The periodic table is arranged in order of atomic number.
2. A period is a horizontal row of the periodic table.
3. A group is a vertical row of the periodic table.

How do you find the group number on the periodic table?

The group numbers should be at the top of each group on the periodic table.

What is period number?

A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.

What is group and period in periodic table?

This arrangement is called the periodic table. The columns of the periodic table are called groups. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type. The horizontal rows are called periods.

How do you find the electronic configuration of a group?

If the element is in s block, then the group number is equal to the number of valence electrons. 2. If the element is in the p block, then the number of the group can be determined by the formula: (number of valence electrons + 10).

How many groups and periods are on the periodic table?

18 groups
Groups are the columns of the periodic table, and periods are the rows. There are 18 groups, and there are 7 periods plus the lanthanides and actinides.

What is a period number?

As an atom’s atomic number increases, its shells must accommodate an increasing number of electrons. The outermost shell is called the valence shell; the period number refers to this shell.

What are groups and periods?

Groups and periods are two ways of categorizing elements in the periodic table. Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.

What does group and period mean in the periodic table?

The columns of the periodic table are called groups. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type. The horizontal rows are called periods.