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Groups in Modern Periodic Table

A group of el...

Question

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 questions in relation to the above group of elements :
(c) If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium ?

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Solution

All the elements in the same group have the same number of valence electrons.

Since Aluminium and Thallium belong to the same group 13.

Therefore, Thallium also has 3 electrons in its outer shell.

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Q. A group of elements in the periodic table is given below (Boron is the first member of the group and thallium is the last.)
Boron
Aluminium
Gallium
Indium
Thallium
Answer the following questions in relation to the above group of elements:
(a) Which element has the most metallic character?
(b) Which element would be expected to have the highest electronegativity?
(c) If the electronic configuration of aluminium is 2, 8, 3, how many electrons will be there in the outermost shell of thallium?
(d) The atomic number of boron is 5. Write the chemical formula of the compound formed when boron reacts with chlorine.
(e) Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.

Q. 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 questions in relation to the above group of elements :
(a) Which element has the most metallic character ?

Q. 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 questions in relation to the above group of elements :
(b) Which element would be expected to have the highest electronegativity?

Q. 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 questions in relation to the above group of elements :
(d) The atomic number of boron is 5. Write the chemical formula of the compound formed when boron reacts with chlorine?

Q. The correct statements among I to III regarding group 13 element oxides are:
I. Boron trioxide is acidic.
II. Oxides of aluminium and gallium are amphoteric.
III. Oxides of indium and thallium are basic.

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