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Recent questions tagged periodic classification of elements
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In the classification of the then known elements, Mendeleev was guided by two factors. What are those two factors ?
asked
Apr 7, 2019
in
Class 10
by
kratos
class-10
cbse
periodic classification of elements
+3
votes
1
answer
What are metalloids ? How many electrons can be present in the valency shell of their atoms ?
asked
Apr 6, 2019
in
Class 10
by
kratos
class-10
cbse
periodic classification of elements
+3
votes
1
answer
Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17).
asked
Apr 5, 2019
in
Class 10
by
kratos
periodic classification of elements
cbse
class-10
+1
vote
1
answer
On what basis did Mendeleev classified the element?
asked
Apr 5, 2019
in
Class 10
by
kratos
properties of elements
atomic theory
class-10
periodic classification
periodic classification of elements
+2
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1
answer
Which one of the elements — Li, Be, B, C, O, F, Ne shows the property of catenation.
asked
Apr 5, 2019
in
Chemistry
by
kratos
organic chemistry
periodicity in properties
classification of elements
class-11
periodic table
class-10
icse
periodic classification of elements
+2
votes
1
answer
In the periodic table alkali metals are placed in the group ........... (A) 1 (B) 11 (C) 17 (D) 18
asked
Apr 5, 2019
in
Class 10
by
kratos
periodic properties
properties of elements
cbse
atomic theory
periodic table
class-10
icse
periodic classification
variations of properties
periodic classification of elements
+3
votes
1
answer
The reaction which does not liberate hydrogen gas is
asked
Apr 5, 2019
in
JEE
by
kratos
jee
hydrogen
class-10
jee mains
bitsat
p - block element
periodic classification of elements
+2
votes
1
answer
Given below are atomic radii of same elements of second ******.
asked
Apr 4, 2019
in
Class 10
by
kratos
class-10
cbse
periodic classification of elements
+1
vote
1
answer
Name one ion for each of the valencies +1, +2 and +3.
asked
Apr 3, 2019
in
JEE
by
kratos
coordination compounds
structure of the atom
molecules
jee
class-9
class-7
icse
class-10
jee mains
atoms
periodic classification of elements
+3
votes
1
answer
On doping Ge metal with a little of In or Ga, we get
asked
Apr 3, 2019
in
Class 12
by
kratos
neet
processes of isolation of elements
class-11
upsee
solid state
class-10
general principle
class-12
periodic classification of elements
+3
votes
1
answer
If p : q = r : *; then show that: mp + np : q = mr + ns : *.
asked
Apr 3, 2019
in
Class 11
by
kratos
classification of elements and periodicity in properties
ratio and proportion
class-8
class-11
alkali and alkaline earth metals
periodic classification of elements
+3
votes
1
answer
The chief ore of iron is -
asked
Apr 3, 2019
in
Class 12
by
kratos
class-10
class-12
bseb model set
periodic classification of elements
+3
votes
1
answer
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
asked
Apr 3, 2019
in
Class 10
by
kratos
ncert class 10 science
class-10
cbse
periodic classification of elements
+3
votes
1
answer
Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations ?
asked
Apr 2, 2019
in
Class 10
by
kratos
class-10
cbse
periodic classification of elements
+1
vote
1
answer
The number of groups in the modern periodic table is
asked
Apr 1, 2019
in
Class 11
by
kratos
classification of elements and periodicity in properties
properties of elements
structure of atom
class-11
atomic theory
class-9
class-10
periodic classification
periodic classification of elements
+1
vote
1
answer
(i) How many shells are there? (ii) Name the element.
asked
Mar 31, 2019
in
Class 11
by
kratos
periodicity in properties
classification of elements
periodic properties
class-11
kvpy
periodic table
class-10
icse
variations of properties
periodic classification of elements
+2
votes
1
answer
why do noble gases have ****** atomic size than halogens?
asked
Mar 29, 2019
in
Class 11
by
kratos
classification of elements and periodicity in properties
class-11
periodic classification of elements
+3
votes
1
answer
A non-metal X which is the largest constituent of air combines with hydrogen when heated in
asked
Mar 29, 2019
in
Class 10
by
kratos
metals and nonmetals
metals and non-metals
class-10
periodic classification of elements
+1
vote
1
answer
(ii) Mention one unique feature each of elements Y and,Z. (iii) Which of the above two elements belong to the same ****** ?
asked
Mar 29, 2019
in
Class 10
by
kratos
class-10
cbse
periodic classification of elements
+3
votes
1
answer
Name any four metalloids ?
asked
Mar 29, 2019
in
Class 10
by
kratos
cbse
class-7
class-10
matter around us
periodic classification of elements
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