elements & compounds, atoms, chemical formulas

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means. It is made up of only one type of atom.

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What is a compound?

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A compound is a substance formed when two or more different types of atoms bond together chemically. Compounds have unique properties that are different from the elements that make them up.

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What is the periodic table?

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The periodic table is a tabular arrangement of all known elements, organized by increasing atomic number. It provides information about the elements, including their symbols and atomic masses.

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What does a chemical formula represent?

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What is an atom?

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An atom is the smallest unit of an element that retains the properties of that element. It consists of protons, neutrons, and electrons.

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What is the atomic number?

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The atomic number is the number of protons in the nucleus of an atom. It determines the identity of the element.

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What are protons?

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Protons are positively charged particles found in the nucleus of an atom. The number of protons determines the atomic number of an element.

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What are neutrons?

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Neutrons are neutral particles found in the nucleus of an atom. They contribute to the atomic mass but do not affect the charge of the atom.

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What are electrons?

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Electrons are negatively charged particles that orbit the nucleus of an atom. They are involved in chemical bonding and reactions.

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How do you determine the number of atoms in a chemical formula?

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