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Questions and Answers
What does the sum of the masses of protons and neutrons account for?
What does the sum of the masses of protons and neutrons account for?
The number of protons in an element is always equal to its atomic mass.
The number of protons in an element is always equal to its atomic mass.
False
What is the relationship between the number of protons and the atomic number?
What is the relationship between the number of protons and the atomic number?
The number of protons is equal to the atomic number.
The atomic number is determined by the number of ______ in an element.
The atomic number is determined by the number of ______ in an element.
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Match the following terms to their definitions:
Match the following terms to their definitions:
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Study Notes
Atomic Mass and Atomic Number
- The sum of the masses of protons and neutrons in an atom determines its atomic mass.
- The number of protons in an atom is equal to its atomic number.
Ions and Valence Shell Structure
- Ions with completely filled p orbitals exhibit the same valence shell structure as the inert gas within the same period.
- Examples include oxygen (atomic number 8) and bromine (atomic number 35).
Periodic Table Organization
- Elements are arranged in order of increasing atomic number.
- The standard periodic table is laid out in 18 columns and 7 rows.
Water Molecule Structure
- If two hydrogen atoms bonded to an oxygen atom through the two orbitals available, the expected H-O-H bond angle would be 180 degrees.
Coordinate Covalent Bonding
- In coordinate covalent bonding, both electrons in the bond originate from a single orbital on one of the atoms involved.
- This type of bonding is common between complex chemical entities.
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Description
This quiz covers key concepts in chemistry including atomic mass and atomic number, the structure of ions, the organization of the periodic table, and the unique properties of water molecules. Test your understanding of how these fundamental concepts interrelate within chemical bonding and molecular structure.
