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The Atom of an Element is Made up of 4 Protons, 5 Neutrons and 4 Electrons. What Are Its Atomic Number and Mass Number? - Chemistry

One Line Answer

The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number?

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Solution

Atomic number = Number of protons or number of electrons = 4

Mass number = Number of protons + Number of neutrons = 4 + 5 = 9

Concept: Atomic Number (Z)
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APPEARS IN

Selina Concise Science Chemistry 1 Class 9 ICSE
Chapter 4 Atomic Structure and Chemical Bonding
Exercise 4 (B) | Q 3 | Page 63
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