5) Which of the following is Incorrect?
(a) Atomic number 8. 16.34, 52 collectively known as chalcogens
(b) In MgF2, both cation and anion are isoelectronic
(c) Element of atomic number = 109, then its electronic configuration will be (n-1)d'ns?
(d) Atomic radius order Ni > Pd > Pt
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Element of atomic number = 109, then its electronic configuration will be (n-1)d'ns?
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