After the discovery of isotopes, scientists were able to conclude that? O all atoms of a given element have the same mass but may have different numbers of protons
O all atoms of a given element have the same number of protons but may have different masses
Od
all atoms of a given element are identical
all atoms of a given element may have different masses and different numbers of protons

all atoms of a given element have the same number of protons but may have different masses

Explanation:

After the discovery of isotopes, scientists were able to conclude that all atoms of a given element have the same number of protons but may have different masses.

Isotopes are atoms of an element that have the same atomic number but different mass number.

The atomic number is the number of protons within an atom.

Mass number is the number of protons and number of neutrons.

Therefore, all atoms of a given element have the same number of protons but different mass.

explanation:

i think option no d is the correct answer

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.