The atomic number is the total number of protons in the nucleus. The mass number is the total number of particles in the nucleus. That includes the neutrons and the protons. So, the atomic number is 31. When you look at the element on the periodic table with a designated atomic number of 31, that would be Gallium, with a symbol of Ga. Mass number is 31 + 36 = 67. So, the answer is A.
21/4 * 4 * 2/3
21 * 2/3
42/3 = 14
Answer:
ik that energy makes us movie and that it powers lights and electronics
kinetic energy ,chemical energy ,potential energy ,and thermal energy
the law of conservation of energy states that the total energy of an isolated system remains constant
Explanation:
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