Question

1. halogens are in family 17. they have _7_ valence electrons.
2. halogens react easily with elements in family 1 like _sodium_
3. whenever halogens bound with the elements in family 1 they form a _?_
4. family 18 are non - metals and have _ valence electrons, except helium.
5. _ are also called \inert gases.\

Explanation:

Question 36

Step1: Recall group 18 elements

Group 18 elements (noble gases) have a full valence shell. Helium has 2 valence electrons, others (neon, argon, etc.) have 8. So family 18 (except He) has 8 valence electrons.

Step2: Fill in the blank

The blank should be 8 as group 18 elements (noble gases, excluding helium) have 8 valence electrons to achieve stability.

Step1: Recall inert gases

Inert gases are the noble gases, which are in family 18. They are called inert because they are unreactive due to full valence shells.

Step2: Identify the group

Family 18 elements (noble gases) are also called inert gases. So the answer is Noble Gases (or Family 18 elements).

Answer:

8

Question 37