Transition metals are less reactive than alkali metals because they have:
A
high ionisation potential and low melting point
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B
high ionisation potential and high melting point
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C
low ionisation potential and low melting point
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D
low ionisation potential and high melting point
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Solution
The correct option is B high ionisation potential and high melting point
Transition metals are less reactive than alkali metals because of their high ionization potential and high melting point.
On moving from left to right of the periodic table for every period, electrons fill in the same shell or orbital, with the alkali metals having the least filled outermost shells, one electron, which equates to fewer protons in them.
Consequently, they have a lesser attraction power from the nucleus, whereas, the corresponding transition metals of the same period have more protons interacting with electrons at the same distance, far from the nucleus as the alkali metals.