Momentum is the product of the mass of a given body and its velocity therefore a body at rest has zero momentum.
Mathematically; momentum = velocity (in m/s) × mass (in kilograms)
therefore, reversing the formula:
mass will be given by the momentum divided by the velocity of the body
thus;
3.2 kg*m/s ÷ 762 m/s =0.0041995 kg
which is approximately 0.0042 kg (4 decimal places) or 4.2 grams (1000 g =
1 kg).
Elements are defined by the number of protons in the nucleus, and aren't considered to be different when you change the number of neutrons on the nucleus. The opposite is true for atoms. All elements and their isotopes, elements with different numbers of neutrons, are considered different types of atoms.
Answer:
p + is the basic notation
