M₁=50 g
m₀=60 g
w=100m₁/m₀
w=100*50/60=83.3%
Answer:
Its the bottom one :) ......
Answer:
The identity of an atom is determined my the number of <u>protons</u>. This is the <u>atomic number</u>.
The particle(s) found inside the nucleus are called <u>protons and neutrons</u>. Their combined mass is referred to as <u>the mass number</u>.
Isotopes have the same number of <u>protons</u>, but different number of <u>neutrons</u>.