Awnser:
Beans are good lol do u love beans or somthing?
Answer:
-74.6 kj/mol
Explanation:
you can see the answer at the pic
Answer: Testing the electrical conductivity of an aqueous solution of the substance is the correct option.
Explanation:
An ionic substance is defined as the substance formed due to transfer of electrons(s) from one atom to another of the combining species.
For example, when a metal and a non-metal chemical combines then an electron will always be transferred from the metal to the non-metal.
Hence, a metal and non-metal always form an ionic bond.
It is known that water is a polar substance and polar or ionic substances readily dissolve in it.
So, when an ionic compound is dissolved in water then it will dissociate into ions. And, as electricity is the flow of ions or electrons hence, an aqueous solution of ionic substance is able to conduct electricity.
But an ionic compound in crystal form will not be able to conduct electricity because then ions are not present in free state.
Thus, we can conclude that testing the electrical conductivity of an aqueous solution of the substance, would be most useful in providing data to determine if the substance is an ionic compound.
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.