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The elements to the left of the the dark line are non-metals.
False
[F‐, F+, F] is stabilized by electron octet.
F-
The nucleus ifself has the ....... charge.
positive
The essential electronic structure of Al is ..... (atomic number=13)
3s² 3p¹
The complete electronic structure of oxygen is ......( atomic number=8)
1s² 2s² 2p⁴
Noble gases are electronegative elements.
False
Halogens have the highest electron affinities.
True
Put them in order from the largest size to smallest size.[ Cu+, Cu, Cu²+]
Cu, Cu+, Cu²+
Put them in order from the smallest size to largest size.[ Cl+, Cl, Cl-]
Cl+, Cl, Cl-
The valance of carbon is [ 3, 4, 2].
4
[ O, Ne, F] has the highest ionization energy.
Ne
Atomic radii [ increase, decrease, remain the same] across a period.
decrease
The ionization energies of elements depend on the electronic structures.
True
Which has larger atomic size? [ C⁶ Or Si¹⁴]
Si
Which has the smallest atomic size among them? [ Li³, Be⁴, B⁵].
B⁵
The elements along each side of the dark line except Al are called .....
metalloids
