Which element has
(a) two shells, both of which are completely filled with electrons?
(b) the electronic configuration 2, 8, 2?
(c) a total of three shells, with four electrons in its valence shell?
(d) a total of two shells, with three electrons in its valence shell?
(e) twice as many electrons in its second shell as in its first shell?
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Final Answer: (a) The element which has two shells, both of which are completely filled is Neon. (b) The element with an electronic configuration 2,8,2 is Magnesium. (c) An element that has a total of three shells and four electrons in its valence shell is Silicon.
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Answer:
a. Neon
b. Magnesium
c. Silicon
d. Boron
e. Carbon
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