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Questions and Answers
Which of the following accurately defines an element?
Which of the following accurately defines an element?
What does the atomic number of an element represent?
What does the atomic number of an element represent?
Which symbol correctly represents an element?
Which symbol correctly represents an element?
Which of the following elements is named after a place?
Which of the following elements is named after a place?
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What characteristic distinguishes an element from a compound?
What characteristic distinguishes an element from a compound?
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Why can't gold be broken down into simpler parts?
Why can't gold be broken down into simpler parts?
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Which of the following is true about the periodic table of elements?
Which of the following is true about the periodic table of elements?
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What is the symbol for antimony, an ancient element used in make-up?
What is the symbol for antimony, an ancient element used in make-up?
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Which element has an atomic number of 20?
Which element has an atomic number of 20?
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Which characteristic is not true for elements?
Which characteristic is not true for elements?
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Study Notes
Elements: The Building Blocks of Everything
- Elements are the fundamental ingredients of everything in our world.
- They are solids, liquids, or gases that cannot be broken down into simpler substances.
- Elements are distinct from compounds or mixtures. Compounds can be broken down into other substances, while mixtures contain different elements or compounds.
Examples of Elements vs. Compounds
- A candy bar, despite being delicious, is a compound (not an element). It's made of components like chocolate, caramel, and peanuts, which can be separated.
- Gold, on the other hand, is an element. Regardless of the process, it remains gold.
Properties of Elements: Atomic Numbers & Symbols
- There are currently 118 known elements.
- Each element has a unique name and a one- to three-letter symbol.
- Element names sometimes come from places, people, or mythical creatures.
- Elements also have an atomic number, which represents the number of protons (positively charged particles) within an atom.
How to Identify Elements
- The unique atomic number distinguishes each element.
- Oxygen has an atomic number of 8, meaning it has 8 protons; calcium has 20, and so on.
- Element symbols typically use the first letter(s) of the element's name.
The Periodic Table of Elements
- The periodic table organizes all known elements in rows and columns.
- Elements with similar properties are grouped together.
- The noble gases, for example, are found in a separate column and share the characteristic of having no color or odor.
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Description
Explore the fundamental concepts of elements and compounds in our world. This quiz covers the unique properties of elements, their atomic numbers, and how they differ from compounds and mixtures. Delve into the distinguishing features that make each element a building block of matter.
