Multiple Choice
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?
A) carbon, sodium, hydrogen, nitrogen
B) carbon, oxygen, phosphorus, hydrogen
C) oxygen, hydrogen, calcium, nitrogen
D) carbon, hydrogen, nitrogen, oxygen
E) carbon, oxygen, nitrogen, calcium
Correct Answer:
Verified
Correct Answer:
Verified
Q1: Which one of the atoms shown would
Q2: The atomic number of sulfur is 16.
Q3: Which of the following is not considered
Q4: How many electron pairs are shared between
Q5: Which of the following pairs of atoms
Q7: One difference between carbon-12( <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5463/.jpg" alt="One
Q8: What bonding or interaction is most likely
Q9: A covalent bond is likely to be
Q10: Two atoms appear to have the same
Q11: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5463/.jpg" alt=" -What results from