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प्रश्न
Write the electronic configuration of element 17T35.
- What is the group number of T?
- What is the period number of T?
- How many valence electrons are there in an atom of T?
- What is the valency of T?
- Is it a metal or non-metal?
- State number of protons and neutrons in T.
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उत्तर
K L M
Electronic configuration = 2, 8, 7
- VIIA
- Third period
- Seven
- Valency of T = -1
- Non-metal
- Protons = 17, Neutrons = 18
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संबंधित प्रश्न
Use the letters only written in the Periodic Table given below to answer the questions that Follow :
1) State the number of valence electrons in atom J.
2) Which element shown forms ions with a single negative charge?
3)Which metallic element is more reactive than R?
4) Which element has its electrons arranged in four shells?
In the following set of elements, one element does not belong to the set. Select this element and state why it does not belong:
Oxygen, Nitrogen, Carbon, Chlorine, Fluorine
In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group ?
The elements A, B, C, D and E have atomic numbers 9, 11, 17, 12 and 13 respectively. The pair of elements which belongs to the same group of the periodic table is:
(a) A and B
(b) B and D
(c) A and C
(d) D and E
Why sodium element of group 1 and chlorine element of group 17 both have valency 1?
How do you calculate the possible valency of an element from the electronic configuration of its atoms?
Select the correct answer
Most reactive character among the elements given below is found in
Arrange the following as per instruction given in the bracket.
K, Pb, Ca, Zn (increasing reactivity)
Supply the missing word from those in bracket:
If an element has one electron in its outermost energy level [shell] then it is likely to be _______.
Name the elements in the correct order of their increasing atomic numbers present in the first, second, and third short periods of the periodic table.
State which of the elements are –
- metallic
- non-metallic
- noble gases
in each of the periods 2 and 3.
