Question

WRITE DOWN TWO EXAMPLES OF :



1) seventeen group

2) first group

3) fourteen group

4) sixteen group

5) first group​

Answer 1

Answer:

1.The group 17 elements include fluorine(F), chlorine(Cl), bromine(Br), iodine(I) and astatine(At)

2.hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).

3.silicon (Si), germanium (Ge), tin (Sn), lead (Pb), and flerovium (Fl).

4.oxygen, sulfur, selenium, tellurium and polonium.