CBSE XI Science Chemistry Classification of Elements and Periodicity in Properties
sir which is the best method to learn s-block elements &p-block elements ?
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25th February 2008
4:53 PM
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CBSE X Science Periodic Classification of Elements
X is an element with atomic number 20.
(¡) Is it a metal or non-metal?
(¡¡)Which of the two X or Mg(with atomic number =12) is more reactive?
(¡¡¡)What is the valency of X?
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29th November 2017
10:00 PM
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CBSE X Chemistry Periodic Classification of Elements
In which period and group would you place the elements with following electronic configurations.
(¡) 2,8 (¡¡)2,5
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29th November 2017
10:18 PM
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CBSE X Chemistry Periodic Classification of Elements
A metal M forms an oxide having the formula M2O3. It belongs to third period in the mordern periodic table . Write the atomic number and valency of the metal.
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29th November 2017
10:26 PM
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CBSE X Chemistry Periodic Classification of Elements
'Hydrogen occcupies a unique position in the Modern Periodic Table'. Justify the statement.
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2nd January 2018
4:44 PM
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CBSE X Chemistry Periodic Classification of Elements
How to find the period and group number when atomic number is given??
Asked by veena23_anandk
4th February 2018
1:04 PM
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CBSE X Chemistry Periodic Classification of Elements
Why is atomic number considered to be a more appropriate parameter than atomic mass for the classification of elements in a periodic table?
Asked by prabal
14th March 2018
9:36 AM
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CBSE X Chemistry Periodic Classification of Elements
how were the positions of cobalt andnickel resolved in the modern periodic table
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14th March 2018
11:58 PM
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ICSE X Chemistry Periodic Table - Periodic Properties and Variations of Properties
C part
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18th March 2018
3:18 PM
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ICSE X Chemistry Periodic Table - Periodic Properties and Variations of Properties
an alkali metal in period 3 and halogen in period 2
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8th April 2018
11:31 AM
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CBSE X Chemistry Periodic Classification of Elements
an element x which is the yellow solid and the non metal forms to oxides Y and Z which are also formed during thermal decomposition of ferrous sulphate crystals and the major air pollutants identify the element X write the electronic configuration of X write balanced chemical equation for the thermal decomposition of ferrous sulphate crystals identify Y and Z and their physical state what would be the nature of oxidize form
Asked by Parasdagger378
22nd June 2018
12:02 PM
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CBSE X Chemistry Periodic Classification of Elements
is is necessary to memorise periodic table.
Asked by vaagai2353
30th June 2018
10:41 PM
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CBSE X Chemistry Periodic Classification of Elements
what is the easiest way to memorize modern periodic table???
Asked by edayoor
11th August 2018
10:09 PM
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ICSE IX Chemistry The Periodic Table
How many period and groups are there in modern periodic table
Asked by disharksh04
13th August 2018
6:45 PM
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ICSE IX Chemistry The Periodic Table
Tell me first 30 atom in periodic tabel
Asked by Avnijoc2111
30th October 2018
8:00 PM
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CBSE X Chemistry Periodic Classification of Elements
How to find the period or group number of an element given ?
Asked by jennithdvk
4th December 2018
6:32 PM
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CBSE X Chemistry Periodic Classification of Elements
Why elements a re arrange in the form of periodic table ? Why hydrogen is placed in first group and first period ?
Asked by bhoiipsita6
10th December 2018
9:25 PM
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CBSE X Chemistry Periodic Classification of Elements
which elements are imp in periodic table
Asked by jain.nishi1996
12th January 2019
2:37 PM
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CBSE X Chemistry Periodic Classification of Elements
Sir, How to know abt periodic classification
Asked by Rasmisajeev
1st February 2019
7:51 PM
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CBSE X Chemistry Periodic Classification of Elements
Please solve this really difficult question for me .
Asked by malaysaha.80
7th February 2019
6:31 PM
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CBSE X Chemistry Periodic Classification of Elements
How were the positions of cobalt and nickel resolved in the modern periodic table?
Asked by dhruvshrotriya03
20th February 2019
8:31 AM
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CBSE X Chemistry Periodic Classification of Elements
What are the similarities between Mendeleev's periodic table modern periodic tablr
Asked by saradamahapatra9999
21st February 2019
1:27 PM
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ICSE IX Chemistry The Periodic Table
What do you know about the occurrence of elements and their classification?
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22nd August 2019
3:39 PM
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CBSE X Chemistry Periodic Classification of Elements
What is meant by (I) a group, and (ii) a period, in a periodic table ?
Asked by webfaridisit
6th January 2020
8:56 PM
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CBSE X Chemistry Periodic Classification of Elements
who gave modern periodic table
Asked by ashishraushan550
25th January 2020
10:42 PM
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CBSE X Chemistry Periodic Classification of Elements
Please answer the 17
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12th February 2020
10:23 PM
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ICSE VIII Chemistry Elements, Compounds and Mixtures
Match the atomic number 4,14,8,15,19 with the each of the following : (a) A solid non metal of valency 3 (b) A gas of the valence 2 (c) A metal of the valence 1 (d) A non metal of the valence 4
Asked by meenajaipur9
23rd May 2020
11:44 AM
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CBSE X Chemistry Periodic Classification of Elements
Just as the way we locate a point on graph as (x, y), can we locate an element as (group number, period)?
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5th December 2020
6:41 PM
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CBSE X Chemistry Periodic Classification of Elements
name two elements of first period in modern periodic table
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6th February 2021
7:09 PM
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