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Questions and Answers
Which of the following best describes an element?
Which of the following best describes an element?
- The simplest form of matter (correct)
- The smallest particle of an element
- A form of matter that can be a solid, liquid, or gas
- A substance that occupies space and has mass
What is the difference between mass and weight?
What is the difference between mass and weight?
- Mass and weight are unrelated to each other
- Mass is the gravitational force acting on an object, while weight is the amount of matter in an object
- Mass is the amount of matter in an object, while weight is the gravitational force acting on an object (correct)
- Mass and weight are the same thing
What are the three components of an atom?
What are the three components of an atom?
- Protons, electrons, and neutrons (correct)
- Electrons, ions, and neutrons
- Protons, ions, and neutrons
- Protons, electrons, and ions
What is the main difference between an element and an atom?
What is the main difference between an element and an atom?
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What is the correct term for the models that describe the structure of an atom as a planetary system?
What is the correct term for the models that describe the structure of an atom as a planetary system?
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Study Notes
Elements
- An element is a pure substance that cannot be broken down into simpler substances by chemical means.
Mass vs. Weight
- Mass is a measure of the amount of matter in an object.
- Weight is a measure of the force of gravity on an object.
Atomic Components
- Atoms are made up of three main components:
- Protons: Positively charged particles found in the nucleus.
- Neutrons: Neutrally charged particles found in the nucleus.
- Electrons: Negatively charged particles that orbit the nucleus.
Element vs. Atom
- An atom is the smallest unit of an element that retains the chemical properties of that element.
- An element is a pure substance made up of only one type of atom.
Bohr Model
- The Bohr model, named after Niels Bohr, describes the structure of an atom as a planetary system, with electrons orbiting the nucleus in specific energy levels.
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