Which is another name for groups of elements? actinides families halogens periods

Answer : B) Families

Explanation : In chemistry, a group is also called as a family which has a vertical column of elements arranged in the modern periodic table of the chemical elements.

There are 18 numbered groups in the modern periodic table, also it has the f-block columns between groups 3 and 4 which are not yet numbered. A group member has a some similar chemical property with each other in the group.

Families is another name for groups of elements

Explanation:

In periodic table, a groups is column of an elements going fro up to down. The groups in periodic table are also named as families.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.