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3.4: Masses of Atoms and Molecules
https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/DMA_Chem_51/2%3A_Beginning_Chemistry_(Ball)/03%3A_Atoms_Molecules_and_Ions/3.4%3A_Masses_of_Atoms_and_Molecules
The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass ...The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass is the sum of the masses of the atoms in a molecule.
2.5: Nuclei of Atoms
https://chem.libretexts.org/Courses/Clackamas_Community_College/CH_112%3A_Chemistry_for_Health_Sciences/02%3A_Elements_Atoms_and_the_Periodic_Table/2.05%3A_Nuclei_of_Atoms
Elements can be identified by their atomic number and mass number. Isotopes are atoms of the same element that have different masses.
2.4: Atomic Structure and Symbolism
https://chem.libretexts.org/Under_Construction/Purgatory/CHEM_2100%3A_General_Chemistry_I_(Mink)/02%3A_Atoms_Molecules_and_Ions/2.04%3A_Atomic_Structure_and_Symbolism
An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass ...An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass of one atom is usually expressed in atomic mass units (amu), which is referred to as the atomic mass. An amu is defined as exactly $1/12$ of the mass of a carbon-12 atom and is equal to 1.6605 $\times$ 10−24 g.
2.4: Atomic Structure and Symbolism
https://chem.libretexts.org/Courses/CSU_San_Bernardino/CHEM_2200%3A_General_Chemistry_II_(Mink)/02%3A_Atoms_Molecules_and_Ions/2.04%3A_Atomic_Structure_and_Symbolism
An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass ...An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass of one atom is usually expressed in atomic mass units (amu), which is referred to as the atomic mass. An amu is defined as exactly $1/12$ of the mass of a carbon-12 atom and is equal to 1.6605 $\times$ 10−24 g.
1.3: Nuclei of Atoms
https://chem.libretexts.org/Courses/Whitworth_University/Science_of_Food_(Russel)/01%3A_Atoms_and_Elements/1.03%3A_Nuclei_of_Atoms
Elements can be identified by their atomic number and mass number. Isotopes are atoms of the same element that have different masses.
2.6: Atomic Structure and Symbolism
https://chem.libretexts.org/Courses/Grand_Rapids_Community_College/CHM_120%3A_Survey_of_General_Chemistry_(Crandell)/02%3A_Measurements_and_the_Periodic_Table/2.06%3A_Atomic_Structure_and_Symbolism
An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass ...An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass of one atom is usually expressed in atomic mass units (amu), which is referred to as the atomic mass. An amu is defined as exactly $1/12$ of the mass of a carbon-12 atom and is equal to 1.6605 $\times$ 10−24 g.
8.01: Masses of Atoms and Molecules
https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Chem_51/1.8%3A_Stoichiometry_and_the_Mole/8.01%3A__Masses_of_Atoms_and_Molecules
The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass ...The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass is the sum of the masses of the atoms in a molecule.
4.5: Nuclei of Atoms
https://chem.libretexts.org/Workbench/CHEM_105%3A_An_Introduction_to__General%2C_Organic%2C_and_Biochemistry/04%3A_Elements_Atoms_and_the_Periodic_Table/4.05%3A_Nuclei_of_Atoms
Elements can be identified by their atomic number and mass number. Isotopes are atoms of the same element that have different masses.
3.5 Masses of Atoms and Molecules
https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Hybrid_Chem_51_v1/04%3A_Atoms_Molecules_and_Ions/3.5_Masses_of_Atoms_and_Molecules
The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass ...The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass is the sum of the masses of the atoms in a molecule.
2.3: Atomic Structure and Symbolism
https://chem.libretexts.org/Bookshelves/General_Chemistry/Chemistry_2e_(OpenStax)/02%3A_Atoms_Molecules_and_Ions/2.03%3A_Atomic_Structure_and_Symbolism
An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass ...An atom consists of a small, positively charged nucleus surrounded by electrons. The nucleus contains protons and neutrons; its diameter is about 100,000 times smaller than that of the atom. The mass of one atom is usually expressed in atomic mass units (amu), which is referred to as the atomic mass. An amu is defined as exactly $1/12$ of the mass of a carbon-12 atom and is equal to 1.6605 $\times$ 10−24 g.
2.2: Masses of Atoms and Molecules
https://chem.libretexts.org/Courses/Williams_School/Advanced_Chemistry/02%3A_Atomic_Structure/2.02%3A_Masses_of_Atoms_and_Molecules
The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass ...The atomic mass unit (u) is a unit that describes the masses of individual atoms and molecules. The atomic mass is the weighted average of the masses of all isotopes of an element. The molecular mass is the sum of the masses of the atoms in a molecule.

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