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Questions and Answers
What was the most significant concept of Dalton's atomic theory?
What was the most significant concept of Dalton's atomic theory?
- The law of constant proportions
- The concept of isotopes
- The existence of electrons
- Atomic mass (correct)
Scientists measured atomic masses by measuring individual atoms directly.
Scientists measured atomic masses by measuring individual atoms directly.
False (B)
What is the unified mass unit denoted by?
What is the unified mass unit denoted by?
u
In carbon monoxide (CO), 3g of carbon combines with 4g of ______.
In carbon monoxide (CO), 3g of carbon combines with 4g of ______.
Match the element to its corresponding symbol:
Match the element to its corresponding symbol:
What is the atomic mass of carbon when using the value in the text?
What is the atomic mass of carbon when using the value in the text?
The table of elements indicates that all elements should be memorized immediately
The table of elements indicates that all elements should be memorized immediately
What is the chemical symbol for potassium?
What is the chemical symbol for potassium?
Flashcards
Atomic Mass
Atomic Mass
The mass of an atom of a specific element, measured relative to the mass of a carbon atom.
Dalton's Atomic Mass Theory
Dalton's Atomic Mass Theory
Dalton proposed that each element has a unique atomic mass, explaining why elements combine in fixed ratios.
Relative Atomic Mass
Relative Atomic Mass
Scientists used chemical reactions and the laws of constant proportions to determine the relative weights of atoms.
Unified Mass Unit (u)
Unified Mass Unit (u)
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Law of Constant Proportions
Law of Constant Proportions
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Carbon Monoxide (CO) Formation
Carbon Monoxide (CO) Formation
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Periodic Table of Elements
Periodic Table of Elements
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Element Symbols
Element Symbols
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Study Notes
Atomic Symbols and Atomic Mass
- Elements have unique symbols, usually the first one or two letters of their name in English, with the first letter capitalized.
- Some symbols are derived from Latin, German, or Greek names.
- Atomic mass is the relative mass of an atom compared to that of a standard (usually carbon-12).
- Carbon mass (as 1u) is used to determine the relative mass of other atoms.
- Relative masses can be determined through chemical combinations of different elements.
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