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Semenov [28]
2 years ago
11

Can somebody help me please? 10 point!

Physics
1 answer:
Vlada [557]2 years ago
7 0
The correct answer is the last one:
A and C are different elements, while D is an isotope of C.

In fact, A and C are different elements, because they have a different number of protons in the nucleus (A has 3 protons, while C has 4 protons). Instead, D and C are the same element (they both have 4 protons in the nucleus), but they are different isotopes since they have a different number of neutrons (D has 4 neutrons while C has 3 neutrons)
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A race car makes one lap around a track of radius 50 m in 9.0 s. What is the average velocity? *
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Given that,

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