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प्रश्न
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?
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उत्तर
The elements at the end of the period have 8 electrons in the valence shell.
Ne = 2, 8
Ar = 2, 8, 8
संबंधित प्रश्न
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
The atomic numbers of the elements Na, Mg, K and Ca are 11, 12, 19 and 20 respectively. The element having the largest atomic radius is:
(a) Mg
(b) Na
(c) K
(d) Ca
What do you understand by orbits?
State the trends in physical properties on moving down the group. Give an example to illustrate.
An element X belong to 3rd periods and group II of the periodic table state:
name of the element,
What is the common feature of electronic configurations of the elements at the end of period 2 and period 3?
The electronic configuration of an element is 2, 8, 4. State it:
name and write its one physical property.
State the property trends in general of elements on moving down in a group of the periodic table.
Fill in the blanks from the words A to F given below’.
A: Decreases
B: Increases
C: Remains same
D: Increases by one
E: Electropositive
F: Electronegative
Across a period from left to right in the Modern Periodic Table.
No. of electron shells _________; No. of valence electrons __________: Electronegativity increases Character of elements changes from electropositive to ________.
Chlorine in the Periodic Table is surrounded by the elements with atomic number 9, 16, 18 and 35.
Which of these have Physical and Chemical properties resembling chlorine?
