What is the relationship between the atomic numbers and ionic radii of the elements in the group 7a
1 answer:
Answer:
The ionic radii increase as the atomic numbers increase.
Explanation:
As we go down a Group, we are adding one more electron shell to the ion.
Each successive shell is bigger than the one before it, so the ionic radius should increase with increasing atomic number.
Here is a table of the ionic radii of the X⁻ ions.
<u>Element </u> <u> Z </u> <u> </u><u>r/pm </u>
F 9 133
Cl 17 181
Br 35 196
I 53 220
At 85 227
However, the relation between r and Z is not linear (see graph).
All we can say is the ionic radius increases as the atomic number increases.
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Answer: The balanced equation is .
Explanation:
The given reaction equation is as follows.
Number of atoms present on reactant side are as follows.
- Li = 1
- H = 1
= 1
Number of atoms present on product side are as follows.
- Li = 1
- H = 2
To balance this equation, multiply Li by 2 and by 2 on reactant side. Also, multiply
by 2 on product side.
Hence, the equation can be rewritten as follows.
Now, number of atoms present on reactant side are as follows.
- Li = 2
- H = 2
Number of atoms present on product side are as follows.
- Li = 2
- H = 2
As there are same number of atoms on both reactant and product side. Hence, the equation is now balanced.
Thus, we can conclude that the balanced equation is .