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If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that....
Copper has the fcc crystal structure. Assuming an atomic radius of 130pm for copper atom (Cu = 63.54
Calculate the ratio of the alkali metal bromides on the basis of the data given below and predict th
A solid between A and B has the following arrangement of atoms Atoms A are arranged in ccp array
The unit cell of silver iodide (AgI) has 4 iodine atoms in it. How many silver atoms must be there i
The radius of a calcium ion is 94 pm and of an oxide ion is 146 pm. Predict the crystal structure of
Molecular formula of Some Chemical Compounds
Numericals on mole concept
Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Period
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbe
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Tabl
An atom has electronic configuration 2, 8, 7. (a) What is the atomic number of this element? (b) To
3. Name (a) Three elements that have a single electron in their outermost shells. (b) Two elements t
What were the criteria used by Mendeleev in creating his Periodic Table?
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his
Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements: K,
What were the limitations of Dobereiner’s classification?
Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.