An atom of calcium is represented by 4220ca. how many neutrons are in the nucleus of this atom?

The answer to this question would be 22 neutrons.

In this question, you are given an atom which has 42 mass number and 20 atomic number. Mass number indicate the atom mass. Atom mass is made by neutrons and protons since electron mass is not significant. Atomic number indicates how much proton the atom has. Since the mass is 42 and 20 of it from the proton, then the neutron in the atom is 42 - 20 = 22 neutrons.

Ithe undersigned only for use your own email and delete any and copies and of the itself and to be there is a good timewhat does a decrease in temperature indicate about the molecules in a sample of liquid water? decreased chemical energy of the moleculesdecreased kinetic energy of the moleculesincreased chemical energy of the moleculesincreased kinetic energy of the moleculeshow does a sample of helium at 15 â°c compare to a sample of helium at 215 k? the helium at 15 â°c has a higher average kinetic energy than the sample at 215 k.the helium at 15 â°c has lower nuclear energy than the sample at 215 k.the helium at 15 â°c has slower-moving atoms than the sample at 215 k.the helium at 15 â°c has smaller atoms than the sample at 215 k.