Chloride ion and potassium ion are isoelectronic. Then
potassium ion is relatively bigger
depends on the other cation and anion
their size are same
chloride ion is bigger than potassium ion
Among Na+, Na, Mg and Mg2+ the largest particle is
Mg2+
Mg
Na
Na+
C.
Na
Reason being, as we move in period atomic radii decreases from left to right due to increase of effective nuclear charge.
Therefore, Na is larger in size than Mg and a neutral atom is larger than its positive ion.
An ionic compound is expected to have tetrahedral structure if r+/r- lies in the range of
0.414 to 0.732
0.225 to 0.414
0.155 to 0.225
0.732 to 1
The correct order of ionisation energy of C, N, O, F is
F < O < N < C
F < N < C < O
C < N < O < F
C < O < N < F
The oxide of an element whose electronic configuration is 1s2, 2s2, 2p6, 3s1 is
neutral
amphoteric
basic
acidic