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Byju's Answer
Standard XII
Chemistry
Groups
An element ha...
Question
An element has its electronic configuration as
2
,
8
,
2
. Now answer the following question:
What is the group of this element ?
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Solution
In a Group, all elements have the same number of valence electrons.
Number of valence electron = Group number
∵
Group number = II
(Since
2
electrons present in valence shell).
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Similar questions
Q.
An element has its electron configuration as 2, 8, 2. Now answer the following question.
a. What is the atomic number of this element?
b. What is the group of this element?
c. To which period does this element belong?
d. With which of the following elements would this element resemble? (Atomic numbers are given in the brackets)
N(7), Be(4), Ar(18), Cl(17)
Q.
An atom of an element has electronic configuration 2,8,2. To which group does it belong?
Q.
An element has its electron configuration as
2
,
8
,
2
. Now answer the following questions: With which of the following elements would this element resemble? Atomic numbers are given in the brackets below:
N
(
7
)
,
B
e
(
4
)
,
A
r
(
18
)
,
C
l
(
17
)
Q.
An element has its electronic configuration as 2,8,2. Now answer the following questions according to modrn periodic table.
a. What is the atomic number of this element?
b. What is the group of this element?
c. To which period does this element belong?
d. With which of the following elements would this element resemble?
(Atomic numbers are given in the brackets)
N (7), Be (4) , Ar (18), Cl (17)
Q.
(a) Define Isotopes.
(b) Write the names of two insert gases.
(c) An element has
2
,
8
,
2
electronic configuration. Write its group number and valency.
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