The Modern Periodic Table - Modern Periodic Table and Electronic Configuration of Elements

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
 ₁₁Na, ₁₅P, ₁₇Cl, ₁₄Si, ₁₂Mg Which of these has largest atoms?

Electronic configuration of element A is 2,8,1. Answer the following questions based on this information.

1. What is the atomic number of element A?
2. Find the group to which this element belongs.

An element has its electron configuration as 2, 8, 1. Now answer the following questions:

1. What is the atomic number of this element?
2. What is the group of this element?
3. To which period does this element belong?

An element has its electron configuration as 2, 8, 2. Now answer the following question.

To which period does this element belong?

An element has its electron configuration as 2, 8, 2. Now answer the following question. 

With which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)

Write the name.

Highest electropositive element

Complete the following chart.

Identify periods of elements and blocks of elements from given electronic configuration?

1. 2, 8, 2
2. 2, 8, 7
3. 2, 1