Answer:
The mass number is defined as the total number of protons and neutrons in an atom.
Explanation:
Answer:
The difference in the number of protons and neutrons in atoms account for many of the different properties of elements.
It's not really possible to tell longitudinal vs. transverse in this image as given. However, we can say that the waves labeled A are high-frequency (short wavelengths) while the waves labeled B are low-frequency (long wavelengths). So, this third answer choice would be correct here.
Both aluminum and chlorine have known charges, which are +3 and -1 respectively. To make them cancel each other out in charge, you would need 3 chlorine and for one aluminum, therefore
would be correct
