Periodic Table

Chapter 9

Periodic Table

Intoduction

• The Periodic Table has more than 103 elements arranged in increasing atomic number (proton number)

  
  

  It is so named because similar chemical and physical properties occur at regular intervals (PERIOD) of the table

  
  

  It has 🡪 18 groups (vertical columns : Group 1-18)

   🡪 7 periods (rows : Period 1-7)

Multiple Choice

Elements in the same Group of the Periodic Table have similar electronic configurations

• Yes

• No

Multiple Choice

Mg, Ca, Sr and Ba are Group 2 elements because...

• they have same physical properties

• they are alkali metals

• they have two valence electrons

Electronic Configuration and Position in Periodic Table

(2 min)

Multiple Choice

Choose the correct electronic configuration for sulphur.

[Ar of S = 16)

• 1s² 2s² 2p⁶ 3s² 3p²

• 1s² 2s² 2p⁶ 3s² 3p⁴

Multiple Choice

Element Y has a valence electronic configuration of ns² np⁵

In which block is Y in?

• s

• p

• d

Multiple Choice

What is the element which has valence electronic configuration of 3d³ 4s²?

• Sn

• Ti

• V

• Sc

Multiple Choice

Element X has 4 valence electrons which occupy the 4th energy level.

identify the location of X in the Periodic Table.

• Group 4, Period 4

• Group 14, Period 4

• Group 4, Period 3

Multiple Choice

Which of the species is larger in size?

• Ca

• Mg

• Ba

• Be