0
How many groups and how many periods does the modern periodic table have hydrogen and helium should be counted as the first period.?
Wiki User
∙ 7y ago
The Periodic Table has 18 groups ant 7 periods. Hydrogen and helium are considered members of the first period.
Wiki User
∙ 7y ago
Wiki User
∙ 6y agoThere are 18 groups and 7 periods.
Add your answer:
Earn +20 pts
What are groups and periods in periodic table?
The columns are called groups and rows are called periods. There are 18 groups and 7 periods.
What is the Number of periods 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.
How are the periods on the periodic table numbered?
The elements are listed in the order of how many atoms they have. For example, hydrogen is the first element on the periodic table. Hydrogen is the smallest element, and has one atom.
The horizontal rows in a periodic table are called groups?
Actually, the horizontal rows in a periodic table are called periods, not groups. Groups are the vertical columns that share similar chemical properties.
What is group and periods in chemistry?
Groups are columns and periods are rows in the periodic table of Mendeleev.
How many periods and groups are there in the periodic table?
There are 18 groups and 7 periods in the periodic table. Groups indicate the number of valence electrons an element has, while periods indicate the number of electron shells an element has.
What are groups and periods in periodic table?
The columns are called groups and rows are called periods. There are 18 groups and 7 periods.
How many groups and periodic are on the periodic table?
7 periods and 18 groups are there on the modern periodic table.
How many periods and groups are on the modern periodic table?
There are 7 periods and 18 groups on the modern periodic table. Periods refer to horizontal rows while groups refer to vertical columns on the table.
How many periods are on the periodic table?
7The periodic table has 7 periods and 18 groups.
How many periods are on the periodic tables?
7The Periodic Table has 7 periods and 18 groups.
What is the Number of periods 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.
How are the periods on the periodic table numbered?
The elements are listed in the order of how many atoms they have. For example, hydrogen is the first element on the periodic table. Hydrogen is the smallest element, and has one atom.
The columns in the periodic table are called?
groups
The horizontal rows in a periodic table are called groups?
Actually, the horizontal rows in a periodic table are called periods, not groups. Groups are the vertical columns that share similar chemical properties.
How many groups periods are to be found in the periodic table?
There are 18 groups in the periodic table that categorize elements based on their similar chemical properties._rows."
What are the classification of element in a periodic table?
periodic table is classified into groups and periods.There are 18 groups and 7 periods in periodic table.
