Carbon-12 is the most common isotope of carbon and has a mass number of 12. However, the average atomic mass of carbon found on a periodic table is slightly more than 12 daltons. Why?

A) The atomic mass does not include the mass of electrons.
B) Some carbon atoms in nature have an extra proton.
C) Some carbon atoms in nature have more neutrons.
D) Some carbon atoms in nature have a different valence electron distribution.


C

Biology & Microbiology

You might also like to view...

Where in a typical human cell does glycolysis occur?

A) mitochondrion B) Golgi apparatus C) cytoplasm D) nucleus E) rough endoplasmic reticulum

Biology & Microbiology

The olfactory bulb in fish help with

A) smell B) balance C) vision D) color deciphering

Biology & Microbiology

What are homologous structures, and how do they provide evidence for evolution?

What will be an ideal response?

Biology & Microbiology

When do opportunistic pathogens tend to cause disease?

A) when the host is young B) when the host didn't wash with soap C) when the host is weakened D) after the host is already infected with a different pathogen E) when the host is old

Biology & Microbiology