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प्रश्न
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a metal.
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उत्तर
Electronic configuration of element A = (2, 8, 8, 1) at atomic no. 19
∴ Element B having 1 electron in outermost orbit is a Metal.
संबंधित प्रश्न
Define a chemical bond.
Mention the basic tendency of an atom which makes it to combine with other atoms.
Separate the following compounds into three categories - ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.
Element X is a metal with a valency 2. Element Y is a non metal with a valency 3.
(a) Write equations to show how X and Y form ions.
(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.
Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.
State the following is a reduction reaction or oxidation reaction.
\[\ce{Fe^2+ - e- -> Fe^3+}\]
Give a reason
Physical properties of isotopes are different.
How do atoms attain noble gas configurations?
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^39_19K}\]
The element that would form anion by gaining electrons in a chemical reaction is ______.
