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Questions and Answers
What is the smallest number in the periodic table box called?
What is the smallest number in the periodic table box called?
What is an element?
What is an element?
What does it mean to have a homogeneous mixture?
What does it mean to have a homogeneous mixture?
What does it mean to have a heterogeneous mixture?
What does it mean to have a heterogeneous mixture?
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What is the atomic weight?
What is the atomic weight?
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Study Notes
Key Concepts in Chemistry
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The smallest number in the periodic table box is known as the atomic number, which represents the number of protons in an atom's nucleus.
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An element is a pure substance that cannot be broken down into simpler substances by chemical means, defined by a unique atomic number and distinguished by its properties.
Mixtures
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A homogeneous mixture is a mixture that has a uniform composition and properties throughout, meaning the individual components are not distinguishable and are evenly distributed.
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A heterogeneous mixture contains visibly different substances or phases, where the components can often be seen and separated, resulting in a non-uniform composition.
Atomic Characteristics
- The atomic weight (or atomic mass) of an element is the weighted average mass of an atom of an element based on the distribution of isotopes in a natural sample, usually expressed in atomic mass units (amu).
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Description
Test your knowledge on homogeneous and heterogeneous mixtures with this quiz. Identify the characteristics of each type and label the correct pictures accordingly.
