Answer:
C. protons + neutrons
Explanation:
The mass number is defined as the total number of protons and neutrons in an atom.
Answer:
When a small amount of external energy in the form of light is applied to the conductor, the valence electrons gain enough energy from the light to break the bonding with the atom and they jumps into the conduction band.
According to the Heisenberg uncertainty principle, which of the following statements about the simultaneous measurements of position and momentum is true?a.Neither quantity can be measured with accuracy.b.The more accurately one value is measured, the less accurately the other value is known.c.Both quantities can be measured with infinite accuracy.d.Accuracy of measurement improves as the object observed becomes less massive. yeah so the answer is b sorry i copied and paste i just wanted to make it fast :(