Answer: Option (b) is the correct answer.
Explanation:
As the given reaction is as follows.
So, when we decrease the temperature for this reaction then there will be decrease in kinetic energy of reactant molecules. As a result, less number of collisions will take place.
Hence, there will be decrease in rate of chemical reaction.
Thus, we can conclude that in the given reaction decreasing the temperature would also decrease the rate of reaction.
The ratio that show the relationship between moles of each reactant and product in the reaction that is
N2 + 3 H2 = 2NH3
the ratio is as follows
1mole N2 : 3 mol H2 :2mol NH3
This ratio is from equation since there is 1 mole of N2 reacted with 3 moles of H2 to produce 2 moles of NH3
Answer:
BeCL2 .1st column 2nd column 3rd column
1. beryllium 2.chloride. 3.beryllium
chloride
I think there is mistake of chemical this is Na2SO4
Na2SO4-----column 1. column 2
1.disodium 2.sulfate
decahydrate
column 3
3.disodium sulfate decahydrate
Explanation:
this is my answer
Answer:
i. Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.
On moving from left to right ( Mg, K) in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Thus, decreasing the atomic radii of the atom on moving towards right of the periodic table.
As moving from top to bottom, there is an addition of shell around the nucleus and the outermost shell gets far away from the nucleus and hence, the distance between the nucleus and outermost shell increases.
Thus the order of atomic radii is : Ca > Mg > K
ii. The energy required to remove the last valence electron from isolated gaseous atom (first ionization energy) increases as we move from left to right in a period. It decreases on moving from top to bottom.
Thus the order of first ionization energy is : K > Mg > Ca
iii. The chemical properties depend on the valence elctrons and as the elements Mg and Ca both have two valence electrons , they have same chemical properties.
P: Good conductor of heat and electricity - R: the delocalized electrons are
free to move around the structure
P: High melting and boiling points - R: the bonds in metals are very strong
P: Ductile (can be stretched and squashed) - R: because the electrons are free to move, the atoms can slide over each other.
P: Malleable (can be hammered into shape) - R: the bonds in metal don't break easily
