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Question
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
Solution
The atomic number of the given element is 14. Hence, the given element is Silicon. Silicon is a metalloid.
RELATED QUESTIONS
Calcium is an element with atomic number 20. Stating reason, answer each of the following questions:-
(i) Is calcium a metal or a non-metal?
(ii) Will its atomic radius be larger or smaller than that of potassium with atomic number 19?
(iii) Write the formula of its oxide.
The following table shows the electronic configuration of the elements W, X, Y, Z:
| Element | w | x | y | z |
| Electronic configurations |
2, 8, 1 | 2, 8, 7 | 2, 5 | 1 |
Answer the following questions based on the table above:
1) What type of Bond is formed between :
a) W and X
b) Y and Z
2) What is the formula of the compound formed between :
a) X and Z
b) W and X
Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?
An element X belong to 3rd periods and group II of the periodic table state:
the valency,
Chorine in the periodic table is surrounded by the elements with atomic number 9, 16, 18 and 35.
Which is more electronegative than chlorine?
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the number of valence electrons,
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element.
Going across a period left to right, atomic size _____.
The similarities in the properties of a group of elements are because they have the same ______.
Select the correct answer from the options given below.
It is a metal in period 2 having electronic configuration 2, 1?
