Advertisements
Advertisements
प्रश्न
How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?
Advertisements
उत्तर
a.
CaO- 1 calcium atom + 1 oxygen atom
Cl2 - 2 chlorine atoms
H2O - 2 hydrogen atoms + 1 oxygen atom
CCl4 - 1 carbon atom + 4 chlorine atoms
b.
Ca - will donate two electrons
O - will accept two electrons
Cl - will accept one electron, so two Cl atoms will share an electron pair.
C - will accept four electrons by sharing electrons pairs with hydrogen forming covalent bonds.
H - will donate one electron by sharing an electron pair with carbon.
APPEARS IN
संबंधित प्रश्न
What do you think would be the observation of `alpha` particle scattering experiment if carried out on (i) heavy nucleus like platinum (ii) light nuclei like litheum.
Why do they exist as monoatoms in molecules?
Name the following:
An element having valency 'zero'
\[\ce{^24_12Mg}\] and \[\ce{^26_12Mg}\] are symbols of isotopes of magnesium.
(a) Compare the atoms of these isotopes with respect to :
i. the composition of their nuclei
ii. their electronic configurations
(b) Give reasons why the two isotopes of magnesium have different mass numbers.
Explain the following:
Carbon-12 and carbon-14 both show similar chemical properties.
The valency of noble gases is ______.
Choose the odd one out and write the reason:
Choose the odd one out and write the reason:
How many atoms of each kind are present in the following molecule:
carbon tetrachloride
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
