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anja@phs.ae anja@phs.ae
wrote...
Posts: 480
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6 years ago
Carbon dioxide is an example of a(n)
  a. atom.
  b. ion.
  c. compound.
  d. mixture.
  e. element

Question 2

Nitrogen, with an atomic number of 7, has
  ____ electrons in the first energy level and
  ____ electrons in the second energy level.
  a. 1; 6
  b. 2; 5
  c. 3; 4
  d. 4; 3
  e. 5; 2
Textbook 
Biology: The Unity and Diversity of Life

Biology: The Unity and Diversity of Life


Edition: 14th
Authors:
Read 64 times
1 Reply

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Replies
wrote...
6 years ago
Answer to q. 1

C

Answer to q. 2

B
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