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Atomic Lexicon Challenge!
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What is one method used to separate a mixture of liquids based on their boiling points?
Distillation
Which of the following best describes the behavior of gas particles?
They move freely and are widely spaced.
What is one key difference between a liquid and a gas in terms of particle movement?
In a liquid, particles are in contact but can move past each other; in a gas, particles are far apart and move freely.
In a solid, atoms are tightly packed and can only vibrate in place.
True
According to kinetic particle theory, what happens to particles in a substance as it is heated?
They vibrate faster and spread apart.
What is one key indicator of a chemical change?
Formation of a new substance (e.g., production of gas, color change, formation of a precipitate).
A physical change alters the chemical composition of a substance.
False
What information does the periodic table provide about elements?
Atomic mass, atomic number, and chemical symbols
How does electron configuration help determine an element's chemical behavior?
Electron configuration determines how atoms interact and bond with other atoms, affecting their chemical properties.
Which of the following best describes a neutron?
A particle with no charge
What is the charge of a proton?
Positive (+)
Electrons are negatively charged particles found inside the nucleus of an atom.
False (do you see why?)
Which of the following describes an isotope?
An atom with a different number of neutrons than protons
How do you calculate the mass number of an atom?
The mass number is the sum of protons and neutrons in the nucleus of an atom.
The atomic number of an atom is determined by the number of protons in its nucleus.
True
What is the main difference between a mixture and a compound?
A mixture is a combination of substances that are not chemically bonded, whereas a compound consists of elements that are chemically bonded.
What is the difference between a compound and an element?
A compound consists of two or more elements chemically combined.
An element is a substance that can be broken down into simpler substances by chemical means.
False
Which of the following best defines a molecule?
A group of atoms bonded together
What is the basic unit of matter?
atom
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