On losing an electron, an atom's mass
A. stays the same, and it is still the same element
B. stays the same, and it becomes a different element
C. is lowered, and it becomes a different element
D. is lowered, but it is still the same element

c

Step-by-step explanation:

More electrons means a negative charge and fewer means a positive charge. ... If an atom were to gain or lose neutrons it becomes an isotope which means it becomes a different element.

true

step-by-step explanation:

because that’s us why