hi,

i was wondering what the two words are for the 18 columns of the periodic table. need an answer within 9:00 est, 6:00 wst

Families? Groups?

periods and groups?

Hi! The periodic table is organized into different sections, one of which is the "groups" or "families." Each group has a specific number or name, which corresponds to the number of valence electrons (the outermost electrons) an element in that group has. The two words you are looking for are "groups" and "families."

To find the names or numbers of the 18 columns in the periodic table, you can go through the periodic table itself or refer to a periodic table reference chart.

Here are the names of the groups in the periodic table:

1. Group 1: Alkali Metals
2. Group 2: Alkaline Earth Metals
3. Group 3-12: Transition Metals
4. Group 13: Boron Group
5. Group 14: Carbon Group
6. Group 15: Nitrogen Group
7. Group 16: Chalcogens
8. Group 17: Halogens
9. Group 18: Noble Gases

Note that there is an alternate numbering system called the "IUPAC system" which uses Roman numerals.

By referring to the periodic table or a periodic table chart, you can count the columns or groups to find the 18 groups/families. Remember that some periodic tables may have additional information or may not start the numbering at group 1 (e.g., some may start at group 3 for transition metals).

I hope this explanation helps you find the answer you're looking for!