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uranmaximum [27]
2 years ago
11

What happens when an electron moves from n=2 to n=5?

Chemistry
1 answer:
Aleksandr-060686 [28]2 years ago
4 0

Answer:

Explanation:

10?

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3 years ago
1. An atom of an elephant has atomic mass of 39 and has number of neutrons as 20 calculate protons number.
r-ruslan [8.4K]

Answer:

See Explanation

Explanation:

1) Let us recall that;

Mass number = number of protons + number of neutrons

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Number of protons = ?

Number of neutrons =20

Mass number =39

Number of protons = mass number - number of neutrons

Mass of protons =39 - 20= 19 protons

2) Atomic number = 13

Number of neutrons =14

Then the mass number =13 +14 =27

The symbol of the element is 27X13

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The atomic number is the same as the proton number =13

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