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Questions and Answers
What is the total number of protons and neutrons in an atom called?
What is the total number of protons and neutrons in an atom called?
- Molecular weight
- Mass number (correct)
- Ionization energy
- Atomic number
Which of the following describes isotopes?
Which of the following describes isotopes?
- Atoms with the same number of electrons but different neutrons (correct)
- Atoms with the same number of protons but different electrons
- Atoms with varying atomic numbers
- Atoms that only differ in their electron configurations
In the periodic table, which of the following elements is located in Group 17?
In the periodic table, which of the following elements is located in Group 17?
- Chlorine (correct)
- Calcium
- Oxygen
- Sodium
Which of the following statements about the atomic structure is true?
Which of the following statements about the atomic structure is true?
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What does the atomic number of an element represent?
What does the atomic number of an element represent?
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Study Notes
Atomic Mass
- The total number of protons and neutrons in an atom's nucleus is called the atomic mass.
Isotopes
- Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
Group 17
- Group 17, also known as the halogens, contains elements like fluorine, chlorine, bromine, and iodine.
Atomic Structure
- The atomic structure is comprised of protons, neutrons, and electrons. Protons and neutrons reside in the nucleus, while electrons orbit the nucleus.
Atomic Number
- The atomic number of an element represents the number of protons in its nucleus, which determines the element's identity.
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