Isotopes of an element have different mass numbers. Complete the sentence to explain why. Because they have different numbers of:neutronsprotonselectrons
Question
Isotopes of an element have different mass numbers. Complete the sentence to explain why. Because they have different numbers of:neutronsprotonselectrons
Solution
Isotopes of an element have different mass numbers because they have different numbers of neutrons.
Explanation: An atom is made up of protons, neutrons, and electrons. The number of protons in an atom determines the atomic number and thus the element. For example, all atoms with 6 protons are carbon atoms. The mass number of an atom is determined by the sum of protons and neutrons.
Isotopes are atoms of the same element (same number of protons) but with different numbers of neutrons. Therefore, they have the same atomic number but different mass numbers. For example, Carbon-12 and Carbon-14 are both isotopes of carbon, but Carbon-12 has 6 neutrons while Carbon-14 has 8 neutrons.
The number of electrons in a neutral atom is equal to the number of protons, so it does not affect the mass number. Therefore, isotopes of an element have different mass numbers because they have different numbers of neutrons.
Similar Questions
Which statement is correct about the isotopes of an element?A. They have the same mass numberB. They have the same electron arrangementC. They have more protons than neutronsD. They have the same numbers of protons and neutrons
Isotopes of the same element have different?Aatomic numbersBnumbers of neutronsCnumbers of electronsDnumbers of protons
Isotopes contain?(i) Same nuclear charge, but different mass number.(ii) Different nuclear charge, but same mass number.(iii) Same nuclear charge and same mass number(iv) Same number of neutrons.
Isotopes of the same element are different from one another in thatMultiple Choicethey have a different number of protons.they have a different number of neutrons.they have a different number of electrons.they are a different element.only one of the isotopes is matter.
Isotopes of an element have the same number ofA. protons and electrons.B. protons and neutrons.C. neutrons and electrons.D. protons, neutrons and electrons
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