Alkali Earth Metals

Q.

In the modern periodic table, which are metals among the first ten elements?

Q.

An element A has 2 electrons in its fourth shell.State:

(a) its atomic number

(b) its electronic configuration

(c) its valency

(d) position in the periodic table

(e) is it a metal or non-metal

(f) is it an oxidising or reducing agent.

Q. The alkaline earth metals are group 2 elements of the periodic table.

1. False
2. True

Q.

(a) How do alkaline earth metals occur in nature ?

(b) Write the electronic configuration of the first two alkaline earth metals.

Q.

(a) Name the first three alkaline earth metals.

(b) Write their reactions with dil hydrochloric acid.

Q.

The elements calcium, strontium, and barium were put in one group of families on the basis of their similar properties, what are those similar properties and what is the usual name of this group of families?

Q.

What is the number of elements in the 1st and 3rd period of the modern periodic table ?

Q. Question 27
What information do you get from the figure about the atomic number, mass number and valency of atoms X, Y and Z? Give your answer in a tabular form.

Q. Which of the following elements belongs to 4n-series?

1. $Pb-207$
2. $Bi-209$
3. $Pb-208$
4. $Pb-206$