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Ch.2 Atoms and the Periodic TableWorksheetSee all chapters

# Atomic Mass (Conceptual)

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Sections
The Atom (Simplified)
Subatomic Particles (Simplified)
Isotopes
Ions (Simplified)
Atomic Mass (Simplified)
Atomic Mass (Conceptual)
Periodic Table: Element Symbols
Periodic Table: Classifications
Periodic Table: Group Names
Periodic Table: Representative Elements & Transition Metals
Periodic Table: Elemental Forms (Simplified)
Periodic Table: Phases (Simplified)
Law of Definite Proportions
Atomic Theory
Rutherford Gold Foil Experiment
Wavelength and Frequency (Simplified)
Electromagnetic Spectrum (Simplified)
Bohr Model (Simplified)
Emission Spectrum (Simplified)
Electronic Structure
Electronic Structure: Shells
Electronic Structure: Subshells
Electronic Structure: Orbitals
Electronic Structure: Electron Spin
Electronic Structure: Number of Electrons
The Electron Configuration (Simplified)
Electron Arrangements
The Electron Configuration: Condensed
The Electron Configuration: Exceptions (Simplified)
Ions and the Octet Rule
Ions and the Octet Rule (Simplified)
Valence Electrons of Elements (Simplified)
Lewis Dot Symbols (Simplified)
Periodic Trend: Metallic Character

The atomic mass of an element can be found on the Periodic Table.

###### Determining Atomic Mass

Concept #1: The atomic masses of elements can be found on the Periodic Table.

Example #1: Which of the following represents an element from the first column with the greatest atomic mass?

On the Periodic Table, the atomic mass is represented by the number with decimal places.

Practice: Which of the following choices has the greatest atomic mass?

Concept #2: Most Abundant Isotope

Example #2: Oxygen consists of three isotopes, 168O, 178O, and 188O. If the atomic mass for oxygen on the periodic table is 15.999 amu, which isotope is the most abundant?

Practice: Vanadium consists of two isotopes, 5023V and  5123V. If the atomic mass for copper on the periodic table is 50.942 amu, are there more atoms of 5023V and  5123V in a sample of vanadium?

Practice: Potassium consists of three isotopes, 3919K, 4019K, and 4119K. Based on its atomic mass, which isotope of potassium is the most abundant?