S P Singh Solutions for Chapter: Periodic Table, Periodic Properties and Variations of Properties, Exercise 3: Intext Questions

The question refers to the elements of the Periodic Table with atomic numbers $3$ to $18$. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.

Which of these is an element with valency $4.$

The question refers to the elements of the Periodic Table with atomic numbers $3$ to$18$.  Some of the elements are shown by letters, but the letters are not the usual symbols of the elements. 

Which of these: 

Have least ionisation energy

 The question refers to the elements of the Periodic Table with atomic numbers $3$ to $18$. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.

Which of these: Have least atomic size in the period $3.$

A group of elements in the Periodic Table are given below (boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

Which element has the most metallic character?

A group of elements in the Periodic Table are given below (boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

Which element would be expected to have the highest electronegativity?

A group of elements in the Periodic Table are given below (boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

If the electronic configuration of aluminium is $2, 8, 3$, how many electrons are there in the outer shell of thallium?

A group of elements in the Periodic Table are given below (boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

The atomic number of boron is $5.$ Write the chemical formula of the compound formed when boron reacts with chlorine.

A group of elements in the Periodic Table are given below (boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.