Questions and Answers
What is an atom?
The smallest unit of an element that has all the properties of that element and the basic building block of all matter.
What charge does an electron have?
Negative charge
Where is a proton found?
In the nucleus of an atom.
What is the charge of a neutron?
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What is a molecule?
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What describes a mixture?
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What is a compound?
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What is a chemical formula?
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What are valence electrons?
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Study Notes
Atom Basics
- Atoms are the smallest units of elements, retaining all properties of those elements.
- They serve as the fundamental building blocks of all matter.
Subatomic Particles
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Electron:
- Carries a negative charge.
- Orbits the nucleus of an atom, playing a crucial role in chemical bonding and reactions.
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Proton:
- Carries a positive charge.
- Located in the nucleus and determines the atomic number and identity of the element.
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Neutron:
- Has no electric charge (neutral).
- Found in the nucleus, contributing to the atomic mass and stability of the atom.
Molecular and Compound Structure
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Molecule:
- The smallest unit of a compound.
- Contains two or more atoms bonded together while retaining the compound's properties.
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Mixture:
- A physical combination of two or more substances.
- Each substance in a mixture retains its individual properties.
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Compound:
- Formed when substances are chemically combined.
- Displays different properties from the individual elements that compose it.
Chemical Representation
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Chemical Formula:
- Represents the ratio of elements in a compound.
- Provides insight into the composition and structure of the molecule.
Electron Configuration
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Valence Electrons:
- The electrons located in the outermost energy level of an atom.
- Play a critical role in chemical reactions and bonding between atoms.
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Description
This quiz features flashcards related to key concepts in chemistry, focusing on atoms and fundamental particles like electrons and protons. Each card provides a concise definition, making it a great study tool for understanding the basic building blocks of matter.
