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प्रश्न
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
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उत्तर
Electronic configuration of element A = (2, 8, 7) at atomic no. 17
∴ Element A has 7 electrons in its outermost shell it is a non-metal.
संबंधित प्रश्न
State differences between the properties of ionic compounds and covalent compounds.
What type of bond is formed between two atoms, when the electronegative difference between them is High ?
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.
Among the following compounds identify the compound that has all three bonds (ionic, covalent and coordinate bond).
State the following is a reduction reaction or oxidation reaction.
\[\ce{Fe^2+ - e- -> Fe^3+}\]
Five atoms are labeled A to E
|
Atoms |
Mass No |
Atomic No. |
|
A |
40 |
20 |
|
B |
19 |
9 |
|
C |
7 |
3 |
|
D |
16 |
8 |
|
E |
14 |
7 |
(a) Which one of these atoms:
(i) contains 7 protons
(ii) has electronic configuration 2,7
(b) Write down the formula in the compound formed between C and D
(c) Predict : (i) metals (ii) non-metals
Give reason
`""_17^35"CI"` and `""_17^37"CI"` do not differ in their chemical reactions.
Identify the following reaction as either oxidation or reduction:
K - e- → K+
Sodium having atomic number 11, is ready to ______ electron/ electrons to attain the nearest noble gas electronic configuration.
How many atoms of each kind are present in the following molecule:
Chlorine
