1. Nitrogen and phosphorus have in the outer layer: (what is the correct answer)
a) 1 e- b) 3 e- c) 5 e- d) 7 e-
2. Nitrogen is part of the period: (what is the correct answer)
a) 1 b) 2 c) 3 d) 4
3. Nitrogen and phosphorus show: (what is the correct answer)
a) similar chemical peculiarity
b) different chemical peculiarity
c) the same chemical peculiarity
d) amphotere peculiarity
Answer:
1. c) 5 e-
2. b) 2
3. a) similar chemical peculiarity
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