Multiple Choice
-Refer to the figure above (first three rows of the periodic table) . If life arose on a planet where carbon is absent, which element might fill the role of carbon?
A) boron
B) silicon
C) nitrogen
D) aluminum
E) phosphorus
Correct Answer:

Verified
Correct Answer:
Verified
Q26: Which one of the atoms shown would
Q27: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5463/.jpg" alt=" -What causes the
Q28: What is the atomic number of the
Q29: The atomic number of each atom is
Q30: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5463/.jpg" alt=" -Which drawing in
Q32: Which of the following correctly describes chemical
Q33: Atoms whose outer electron shells contain 8
Q34: Which of the following is true for
Q35: What factors are most important in determining
Q36: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5463/.jpg" alt=" -In the figure