Two Atoms Appear to Have the Same Mass Number

question 10

Multiple Choice

Two atoms appear to have the same mass number. These atoms

• A) must have the same atomic number.
• B) must have the same number of electrons.
• C) must have the same chemical properties.
• D) must have the same number of protons + neutrons.
• E) must have the same atomic number, the same number of protons + neutrons, the same number of electrons, and the same chemical properties.

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Definitions:

Elemental Symbol

A short representation using letters to signify a chemical element on the periodic table.

Mercury

A heavy, silvery d-block element, also known as quicksilver, that is liquid at room temperature and used in thermometers, barometers, and batteries.

Elemental Symbol

A one- or two-letter abbreviation that represents a chemical element (e.g., H for hydrogen, O for oxygen).

Potassium

A soft, silvery-white metallic element, symbol K, with atomic number 19, essential for many biological functions and used in various industrial applications.