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Questions and Answers
What does the mass number of an atom represent?
What does the mass number of an atom represent?
Which of the following statements about isotopes is correct?
Which of the following statements about isotopes is correct?
How is the atomic mass of an element determined?
How is the atomic mass of an element determined?
What is the charge of an ion that results from a metal atom losing two electrons?
What is the charge of an ion that results from a metal atom losing two electrons?
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If the atomic mass of boron is given as 10.81 g/mol, which of the following must be true?
If the atomic mass of boron is given as 10.81 g/mol, which of the following must be true?
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Which notation correctly represents the isotopes of boron?
Which notation correctly represents the isotopes of boron?
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What distinguishes a cation from an anion?
What distinguishes a cation from an anion?
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If an atom has 6 protons, 6 neutrons, and 5 electrons, what is its charge?
If an atom has 6 protons, 6 neutrons, and 5 electrons, what is its charge?
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Study Notes
Atomic Structure
- Atomic symbol (X) represents an element.
- Mass number (A) is the total number of protons and neutrons; calculated as A = Z + N.
- Atomic number (Z) is the number of protons and electrons in the nucleus.
- Number of neutrons (N) can be found using the formula N = A - Z.
Isotopes
- Isotopes are variations of an element with the same number of protons but different numbers of neutrons.
- They maintain the same atomic number but have differing mass numbers.
Atomic Mass
- Atomic mass (or atomic weight) is the weighted average of the masses of an element's naturally occurring isotopes.
- This average is calculated based on the isotopes' natural abundances.
Ions
- An ion is defined as an atom or molecule with an electric charge.
- Ions are denoted with a superscript indicating the size and sign of the charge.
- When a metal atom loses electrons, it forms a cation, which is a positively charged ion.
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Description
Test your understanding of atomic structure, isotopes, and ions with this quiz. Explore key concepts such as mass number, atomic number, and atomic mass. This quiz will challenge your knowledge of elemental variations and ion formation.
