Correct option is B
The correct answer is: B) 35
Explanation:
The mass number of an atom is the sum of the number of protons and neutrons in its nucleus.
Given:
Number of protons = 17
Number of neutrons = 18
Mass number === Number of protons +++ Number of neutrons
Mass number =17+18=35= 17 + 18 = 35=17+18=35
Mass number =17+18=35= 17 + 18 = 35=17+18=35
Information Booster:
- Atomic number (Z): The number of protons in an atom, which defines the element.
- Isotopes: Atoms of the same element with different numbers of neutrons, thus having different mass numbers.
- Electrons: In a neutral atom, the number of electrons equals the number of protons.
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