Question

Name the following-
1. Group 1 elements
2.Group 17 elements
3. Group 18 elements
4. Beryllium-Aluminium
5. Lanthanides and Actinides

Just for reference this question is of Class 9 ICSE​

Answer 1

Answer:

group 18 elements noble gases

group 1 elements known as alkali metals

group 17 elements known as halogens

beryllium and aluminium belongs to alkaline earth metal

Answer 2

1. alkali metal
2. halogen
3. zero, Nobel gas
4. have the same electronegativity
5. make up the inner transition metals.

hope it helps you ☺

( 4 and 5 questions, I couldn't find in my book ( 9 ICSE )).

:-(