Answer:
protons and neutrons
Explanation:
those particles account for 99.99% of mass
75km/hr
A car traveling with constant speed travels 150km in 7200 s. What is the speed of the car
The mass number of an isotope can be expressed <span>by simply writing the name of the element or symbol followed by a hyphen and the mass number.
Example:
Carbon-13, Carbon-14
Oxygen-17
Uranium-235
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