The atomic number of an atom is 30 and its mass number is 60. Which of the following is correct?

Number of electrons = 30

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Number of neutrons = 19

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Number of neutrons = 29

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Number of protons = 39

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Solution

The correct option is A Number of electrons = 30
Given that,
Atomic number = 30 and Mass number = 60
We know that,
Atomic number = number of protons = number of electrons = 30
Also,
Number of neutrons = mass number - atomic number = 60 - 30 = 30

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The atomic number of an atom is 30 and its mass number is 60. Which of the following is correct?

The correct option is A Number of electrons = 30Given that, Atomic number = 30 and Mass number = 60 We know that, Atomic number = number of protons = number of electrons = 30 Also, Number of neutrons = mass number - atomic number = 60 - 30 = 30

The correct option is A Number of electrons = 30
Given that,
Atomic number = 30 and Mass number = 60
We know that,
Atomic number = number of protons = number of electrons = 30
Also,
Number of neutrons = mass number - atomic number = 60 - 30 = 30