Question

12. 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 ?
(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 are there in the outer 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.​

Answer 1

Answer:

1.Thallium

2.Boron

3. 3 electron

4.BCI3

5.Less metalic because on moving from left to right in a periodic table metalic character decreases

Explanation:

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