What is the total number of electrons that can occupy the first and second principal energy levels ( n =1, n =2) ?
A) 2
B) 6
C) 8
D) 10
E) 18
Correct Answer:
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Q46: Which of these elements is a metal?
A)
Q47: Which of these is a nonmetal?
A) Mg
B)
Q48: Elements belonging to the same group have
Q49: Which of these elements has three valence
Q50: The elements Li, Na, K, Rb, and
Q52: Which scientist is responsible for the theory
Q53: Which of the following is true?
A) Carbon
Q54: He has the same number of valence
Q55: The elements of the group 1 A
Q56: Which of the following elements is not
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