It will always be equal to the mass of the reactants in a reaction.
B) is a right answer because molar mass equal molecular atomic mass meaning Ar(Na)=23 and so M(Na)=23 as well.
Wheres the diagram
We have to see the diagram to answer your question
False I believe. Hope this helps :)
Answer:
Yah, it's true.
because protons are represented as helium (²4He) which are positive.
electrons are represented as 0-1e which is negative