What is the atomic number of an element?
Correct!
Wrong!
The atomic number is defined as the number of protons in the nucleus of an atom, which determines the element's identity and its position on the periodic table.
Which subatomic particles are located in the nucleus of an atom?
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Wrong!
The nucleus of an atom contains protons and neutrons, while electrons are found in the electron cloud surrounding the nucleus.
What is the charge of an electron?
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Wrong!
Electrons have a negative charge, which balances the positive charge of protons in a neutral atom.
Isotopes of an element differ in the number of which subatomic particle?
Correct!
Wrong!
Isotopes of an element have the same number of protons but differ in the number of neutrons, resulting in different atomic masses.
Which of the following best describes the mass number of an atom?
Correct!
Wrong!
The mass number is the total number of protons and neutrons in the nucleus of an atom, representing its approximate atomic mass.