Match each word to it's correct meaning.

1. atomic mass
2. isotope
3. meson
4. neutrino
5. positron

atom with the standard atomic number and chemical properties but different atomic mass and physical properties.

nuclear particle of the mass of an electron but with a positive charge, symbolized by .

a particle one-eighth the mass of protons; charge varies. symbolized by k, π, or μ.

the total number of protons plus neutrons in an atomic nucleus.

neutral particle of nearly zero mass, produced by decaying nuclei and symbolized by ν.

1. The total number of protons plus neutrons in an atomic nucleus.

2. Atom with the standard atomic number and chemical properties but different atomic mass and physical properties.

3. A particle one-eighth the mass of protons; charge varies. Symbolized by K, π, or μ.

4. Neutral particle of nearly zero mass, produced by decaying nuclei and symbolized by ν.

5. Nuclear particle of the mass of an electron but with a positive charge, symbolized by.

b.final

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.