# How many periods are on the modern periodic table?

In the periodic table of the elements there are 7 periods and 18 groups. The rows are called periods and columns are called groups. You may be getting confused by the lanthanides and actinides. These groups of elements are found in two rows at the bottom and seem to not be a part of the table. However, if you find and extended version of the table you will see that, technically, these two rows belong in Periods 6 and 7.

### How many periods are there in modern periodic table?

There are 7 periods in the modern periodic table.

### How many periods are there on the modern periodic table?

The modern periodic table has seven periods.

### How many periods are there in the Modern Periodic Table?

There are 7 periods in the periodic table.

### How many periodic are there in modern periodic table?

There are 7 periods in the modern periodic table.

### How many groups and how many periods does the modern periodic table have?

Modern periodic table has 7 periods and 18 groups.

### How many periods and groups are on the modern periodic table?

7 periods and 18 groups are there on the modern periodic table.

### How many periods are present in the modern periodic table?

The periodic table contain 7 periods.

### How many periods are there in the main body of a periodic table?

There are 7 periods in the modern periodic table.

### How many rows are there in Modern periodic table?

There are 7 rows in Modern Periodic Table . These rows are referred as Periods.

### How many groups are found in a periodic table?

There are 18 groups and 7 periods in the modern periodic table.

### How many periods are there in the modern periodc table?

There are seven periods in the periodic table. Other two rows comprises of lanthanides and actinides.

### How many periods are there in your Periodic Table?

There are seven periods in any periodic table.

### How many rows or periods are in the periodic table?

Periods are horizontal rows. There are 7 periods in periodic table.

### How many periods can you find on the periodic table?

There are 9 periods on the periodic table, with the 8th and 9th periods on the extended periodic table (Actinides and Lanthanides).

### How many periods table are there on the periodic table?

Th horizontal rows are referred as periods. There are 7 periods in periodic table.

### How many groups and how many periods does the modern periodic table have hydrogen and helium should be counted as the first period.?

There are 18 groups and 7 periods.

### How many periods are on the periodic table?

7 The periodic table has 7 periods and 18 groups.

### How many periods and groups are there in the periodic table?

There are 18 groups and 7 periods in the periodic table.Groups are vertical columns and periods are horizontal rows.All the elements in the period has same number of energy level.

### What is The period how many are they in a periodic table?

Periods are the horizontal rows in the periodic table of Mendeleev; this table contain 7 periods.

### How many groups and how many periods make up the periodic table?

There are 18 groups and 7 periods in the periodic table.

### What a period is and how many there are in a periodic table?

Horizontal rows are termed as periods. There are 7 periods in periodic table.

### What rows in the periodic table identify how many energy levels a nucleus has?

The periods (horizontal rows on the modern periodic table) identify how many electron energy shells the atom has (these are not energy levels of the nucleus)

### How many rows of elements does the periodic table has?

Periodic table has seven rows.They are known as periods of periodic table.

### How many periods make up the periodic table?

there are 7 periods and 18 groups that make up the periodic table.. =) Asma.

### How many periods of elements are on the periodic table?

The periodic table has 7 periods and 18 groups. The periods are in a horizontal line and the groups are in a straight line like up to down.

### What are Elements in the modern periodic table arranged by?

They're arranged in rows on how much protons they have, then divided into periods by how many energy levels they have.

### How many element are included in the modern periodic table?

There is 87 elements in the modern periodic table :)

### How many rows are horizontal on the periodic table?

there are seven horizontal rows on a periodic table and they are called PERIODS.

### How many periods are on the table?

There are seven periods on the periodic table. The lanthanides are in period 6, and the actinides are in period 7.

### How many regions are there in the periodic table with in each element?

The periodic table of Mendeleev has 18 groups and 7 periods.

### How many peroids are in the periodic table of elements?

There are 7 periods in periodic table.They are horizontal rows.

### How many periods of elements are there?

The periodic table of Mendeleev has 18 groups and 7 periods.

### How many elements are there in the modern periodic table?

The periodic table has 118 elements and counting...

### How many groups does the modern periodic table have?

The periodic table of Mendeleev has 18 groups.

### How many main groups in the modern periodic table of elements are there?

There are 18 main groups in the modern periodic table of elements.

### How are the periods on the periodic table numbered?

They Are numbered by how many protons there is

### How many rows are there on the periodic table?

these are not called rows they are called periodes.now let us proceed there are 7 periods in the periodic table.

### How many elements are included modern periodic table?

The modern periodic table (May 2012) contain 118 chemical elements.

### Why was mendeleev's table called periodic?

The table is called periodic because many traits of different elements develop recurring trends, or periods.

### How many lanthanides and actinides present in modern periodic table?

There are 14 lanthanides and 14 actinides in periodic table. They are placed at the bottom of periodic table.