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Questions and Answers
Biochemistry is the chemistry of non-living things.
Biochemistry is the chemistry of non-living things.
True
The gas state of matter possesses the least kinetic energy.
The gas state of matter possesses the least kinetic energy.
False
The number of protons in an atom determines its identity as a particular element.
The number of protons in an atom determines its identity as a particular element.
True
A cation is an ion that is negatively charged due to excess electrons.
A cation is an ion that is negatively charged due to excess electrons.
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Oxygen is the most abundant element in the universe.
Oxygen is the most abundant element in the universe.
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Study Notes
Chemistry Study Guide
- Chemistry: The study of matter's composition, structure, and properties.
- Physical Chemistry: A fundamental branch of chemistry supporting other areas.
- Biochemistry: The chemistry of living organisms.
- Scientific Method Steps: Observing, hypothesizing, and experimenting.
- Accuracy: How close a measurement is to the true value.
- Precision: How consistent measurements are.
- Kinetic Energy: The energy of motion.
- States of Matter: Solid, liquid, and gas; different kinetic energy levels.
- Most Abundant Element (Universe): Hydrogen.
- Most Abundant Element (Earth's Crust): Oxygen.
- Dalton's Theories: Law of Definite Composition and Law of Multiple Proportions.
- Signs of a Chemical Change: Formation of gas, precipitate, or energy release.
- Isotopes: Atoms of the same element with different mass numbers.
- Identifying an Element: Determined by the number of protons in its nucleus.
- Atomic Mass Unit (amu): The unit used to measure atomic mass
Atomic Structure Table
- Symbol: Representation of an element.
- Z: Atomic number (number of protons).
- A: Mass number (protons + neutrons).
- N: Number of neutrons (A - Z).
- Number of electrons: Equal to the number of protons in a neutral atom.
- Electrical Charge: Indicates whether the atom is neutral (0), cation (+), or anion (-).
Definitions
- Ion: An atom or molecule with a net electrical charge due to unequal numbers of protons and electrons.
- Cation: A positively charged ion (fewer electrons than protons).
- Anion: A negatively charged ion (more electrons than protons).
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Description
Explore the fundamentals of chemistry in this comprehensive study guide. Covering key concepts such as physical chemistry, biochemistry, states of matter, and the scientific method, this guide is perfect for students looking to enhance their understanding of chemical principles. Test your knowledge and grasp the essential theories and properties of matter.
