T / F: A calcium ion (Ca2+) with an atomic number of 20 has an electron configur

Question

T / F: A calcium ion (Ca2+) with an atomic number of 20 has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2.
b) T / F: Francium is the least electronegative element on the periodic table because it is located at the bottom of the Group I elements.
c) T / F: The Hume-Rothery rules can be used to predict the degree to which solute atoms dissolve in a solvent.
d) T / F: Metals can have a band gap.
e) T / F: Diffusion is not a thermally activated process.
f) T / F: Applying a stress greater than a material’s yield strength may cause it to plastically deform.

Explanation / Answer

A) the given question is wrong because the atomic number of calcium ion Ca2+ should be 18 but not 20. or the question should be this way calcium with an atomic number 20 has an electronic configuration of 1s2 2s2 2p6 3s2 3p6 4s2.then the answer will be true.

b) true

c) true

d) false

e) false

f) true

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