Answer:
C.) 35
Explanation:
The mass is made up of the total protons and neutrons in an atom. Protons and neutrons both have a mass of 1 amu. Electrons are not included in this measurement because they have an insignificant mass (practically 0).
(17 protons x 1 amu) + (18 neutrons x 1 amu) = 35 amu
Therefore, if an atom contains 17 protons and 18 neutrons, the mass should be 35 amu.
Did you mean when it is a liquid?
Answer:
CaCO3 is false
Explanation:
Because HCl is hydrongen chloride
Ice cream will have a physical change because you can re freeze it and it will still be ice cream
