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If E is the symbol for an element, which two of the following symbols represent isotopes of the same element?

If E is the symbol for an element which two of the following symbols represent isotopes of the same element class=

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Eduard22sly

Answer: A and D

Explanation: isotopes must have same atomic number but different mass number due to the difference in their Neutron number

Lanuel

If E is the symbol for an element,  the two symbols which represent isotopes of the same chemical element are: A and D.

Isotopes can be defined as two or more forms of a chemical element that comprises equal atomic number (numbers of protons) and electrons but different numbers of neutrons.

The isotope of an element is denoted by [tex]X_Z^A[/tex]

Where;

  • X is the symbol of the chemical element.
  • A is the atomic mass or mass number (number of nucleons).
  • Z is the atomic number or number of protons.

If the mass number = 20

Atomic number (numbers of protons) = 10

[tex]Number\;of\;neutron = A - Z\\\\Number\;of\;neutron = 20 - 10[/tex]

Number of neutron = 10

Note: The answer option with the same atomic number (numbers of protons) but different mass number is A and D.

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