If carbon has an atomic mass of 12 and an atomic number of 6 then it has
A. 6 electrons.
B. 12 electrons.
C. 18 electrons.
D. as many as 6 but no more than 12.
E. None of the choices are correct.
A. 6 electrons.
You might also like to view...
Which of the following is a common way in which both phosphorus and sulfur are deposited on land?
a. rock weathering b. condensation c. sublimation d. photosynthesis
The first known hominin species to leave
Africa was
a. Homo sapiens b. Homo erectus c. Homo habilis d. Australopithecus afarensis e. Homo neanderthalensis
Water is an excellent solvent for biological systems because
A) it can maintain a relatively unstable temperature for chemical reactions to occur. B) compounds with ionic bonds as well as those with polar covalent bonds readily dissolve in water. C) it is semisolid at body temperature, preventing it from flowing freely through the human body. D) it can rearrange its bonds, forming covalent bonds with other molecules once dissolved.
Which protist clade (supergroup) is characterized by their greatly modified mitochondria?
a. excavates b. unikonts c. rhizarians
d. archaeplastids e. chromalvolates