Questions and Answers
What is a mixture?
A combination of two or more components
What does periodic mean?
Occurring at regular intervals
What is an element?
Substances composed of only one type of atom
CO2 is an element.
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N2, O2, and Cu are elements.
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Some elements are liquids or gases.
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What is the chemical symbol for gold?
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What is the chemical symbol for nitrogen?
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What is the chemical symbol for oxygen?
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What is the chemical symbol for lead?
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What is the chemical symbol for iron?
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What is the chemical symbol for sulfur?
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What is the chemical symbol for calcium?
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Pure gold is _____.
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An element has more than two kinds of atoms.
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How many different elements have been discovered?
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Carbon is an element.
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Elements cannot be seen with the eye.
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The illustrated arrangement of the elements and their atomic properties is summarized in the _____.
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The first letter of the element symbol is capitalized.
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Elements located in the vertical column of the Periodic Table are the same _____ and have _____ chemical properties.
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Study Notes
Mixture
- A mixture consists of two or more components combined together.
Periodic
- Refers to events or occurrences happening at regular intervals in time.
Element
- Elements are pure substances made up of only one type of atom.
Carbon Dioxide
- CO2 is not an element; it is a compound made of carbon and oxygen.
Elements in Nature
- N2 (nitrogen), O2 (oxygen), and Cu (copper) are all classified as elements.
Physical States of Elements
- Some elements naturally exist in liquid or gas forms at room temperature.
Element Symbols
- Gold is represented by the symbol Au.
- Nitrogen is represented by the symbol N.
- Oxygen is represented by the symbol O.
- Lead is represented by the symbol Pb.
- Iron is represented by the symbol Fe.
- Sulfur is represented by the symbol S.
- Calcium is represented by the symbol Ca.
Pure Gold
- Pure gold is classified as an element.
Attributes of Elements
- Elements contain only one type of atom, disproving the idea that they consist of more than two kinds of atoms.
Total Elements Discovered
- Over 100 different elements have been identified in science.
Carbon Classification
- Carbon is recognized as an element.
Visibility of Elements
- Elements can be observed with the naked eye under certain conditions.
Periodic Table of Elements
- The arrangement of elements and their atomic properties is compiled in the Periodic Table of Elements.
Element Symbols Formatting
- In element symbols, the first letter is always capitalized, while the second letter, if present, is lowercase.
Group Characteristics in the Periodic Table
- Elements that are aligned vertically in the Periodic Table share the same group and exhibit similar chemical properties.
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Test your understanding of basic chemistry concepts with these flashcards focusing on elements, mixtures, and periodic properties. Each card features a key term and its definition, alongside true or false questions to challenge your knowledge. Perfect for students looking to reinforce their learning in science.
