Question

1. the elements in group 17 are called the ______
2. the elements in group ______ are the most reactive metals.
3. the elements in group ______ are the most reactive nonmetals.
4. the elements in group ______ are very unreactive.
5. the elements in group ______ are the most reactive metals.
6. the elements in group ______ are the most reactive nonmetals.
7. the elements in group ______ are very unreactive.
8. the elements in group ______ react very violently with water

Explanation:

Question 11:

Group 17 elements are known as halogens (e.g., fluorine, chlorine, bromine).

Question 12:

Group 1 (alkali metals: Li, Na, K, etc.) has the most reactive metals due to one valence electron, easily losing it.

Question 13:

Group 17 (halogens) has the most reactive nonmetals, needing one electron to fill the valence shell.

Question 14:

Group 18 (noble gases: He, Ne, Ar) has full valence shells, making them very unreactive.

Question 15:

Group 1 (alkali metals) are the most reactive metals (same as Q12).

Question 16:

Group 17 (halogens) are the most reactive nonmetals (same as Q13).

Question 17:

Group 18 (noble gases) are very unreactive (same as Q14).

Question 18:

Group 1 (alkali metals) react violently with water (e.g., Na + H₂O → NaOH + H₂).

Answer:

1. halogens
2. 1
3. 17
4. 18
5. 1
6. 17
7. 18
8. 1