Question

How many groups/families are there on the periodic table? Why do we call them families, what is similar about each element in the group?

Answer 1

In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns (between groups 3 and 4) are not numbered.

Answer 2

Answer:

There are 18 groups /families in a periodic table. They are called families because of the similar chemical behaviours all the elements in a group show.All members in a group have same number of valence electron.

Explanation:

• Periodic table is a table of chemical elements arranged in rows and columns.
• Dimitri Mendeleev is the father of periodic table.
• All elements are arranged in their increaing atomic number and recurring chemical properties.
• Row is a period and column is a group. Elements in same group have same valence electron configuration whereas elements in same period have increasing order of valence electron.
• There are 118 elements in a periodic table out of which 18 are non metal , 7 are metalloids and remaining are different types of metals.
• A total of 18 groups exist in a periodic table -

1. Group 1- lithium family
2. Group 2 - beryllium family
3. Group 3- scandium family
4. Group 4-titanium family
5. Group 5- vanadium family
6. Group 6-chromium family
7. Group 7- manganese family
8. Group 8 - iron family
9. Group 9 -cobalt family
10. Group 10 -nickel family
11. Group 11 -copper family
12. Group 12 -zinc family
13. Group 13 - boron family
14. Group 14 - carbon family
15. Group 15 - nitrogen family (pnictogens)
16. Group 16- oxygen family (chalcogens)
17. Group 17  - fluorine family (halogens)
18. Group 18 -helium family (noble gases)

To learn more about periodic table from the given link-

https://brainly.in/question/267943

To learn more about electron from the given link-

https://brainly.in/question/6495031

#SPJ3