Advertisements
Advertisements
Question
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 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?
Advertisements
Solution
If the electronic configuration of aluminium is 2, 8, 3, then 3 electrons are there in the outer shell of thallium.
RELATED QUESTIONS
What is meant by a period, in a periodic table?
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
What do you understand by typical elements?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
Give the symbol and valency of the following element and radical.
Potassium
Find the odd one out and give its explanation.
The modern periodic table has 1 to 7 periods.
The arrangement of elements in the Modem Periodic Table is based on their ______
Explain the position of hydrogen in the periodic table.
