Properties of Alkali metals

Q.

Neon and chlorine have atomic numbers 10 and 17 respectively. Their valencies will be ______ and ______ respectively.

Q.

The combining capacity of an element is known as -----------------------

Q.

$Be$ has 2 electrons in its outer shell, $O$ has 6 electrons in its outer shell. Choose the correct option:

1. Be and O have valency 1 and 2 respectively

2. Be and O have valency 2 and 2 respectively

3. Be and O have valency 1 and 6 respectively

4. Be and O have valency 1 and 7 respectively

Q.

$Be$ has 2 electrons in its outer shell, $O$ has 6 electrons in its outer shell. Choose the correct option:

1. Be and O have valency 1 and 7 respectively

2. Be and O have valency 2 and 2 respectively

3. Be and O have valency 1 and 6 respectively

4. Be and O have valency 1 and 2 respectively

Q. Alkali metals have one electron in their valence shell.

1. True
2. False

Q. Name the element having only one shell and one valence electron.

Q.

Sodium can be cut by a knife, so it is a metalloid.

1. True

2. False