Physical Science SPS 1: Atoms and The Periodic Table- Flashcard

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What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus containing protons and neutrons, surrounded by electrons.

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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 and the identity of the 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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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 element's identity and its position on the periodic table.

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What is the atomic mass?

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The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). It reflects the total number of protons and neutrons.

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What are isotopes?

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Isotopes are variants of the same element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.

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What is the periodic table?

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The periodic table is a tabular arrangement of elements organized by increasing atomic number, which groups elements with similar properties.

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What are metalloids?

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Metalloids are elements that have properties intermediate between metals and nonmetals. They are often semiconductors, used in electronics.

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What are metals?

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Metals are elements that are typically shiny, malleable, ductile, and good conductors of heat and electricity. They are found on the left side of the periodic table.