Which of the following pairs of atoms represent isotopes?
a. 14n, 14c
b. 12c, 14c
c. 77se, 19fe
d. 1h, 18o
e. 79br, 35cl

Explanation:

Isotopes are atoms of the same element that have the same number of protons (needless to say since they are from the same element) but they have different numbers of neutrons and hence masses.

These are two different atoms from the same element, carbon with the same number of protons but different number of neutrons hence the different relative atomic masses

i don,t know so just answer mine

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.