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Atom Questions and Answers 100% Solved
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Exam of 1 pages for the course Atom at Atom (Atom)
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AtomAtom - answer An atom is the smallest particle of an element that still has elemental
properties.
Atoms are made up of similar properties called protons, neutrons, and electrons. The
smaller electrons orbit around a central nucleus of protons and neutrons
Atomic number - answer The number of protons in the nucleus of an atom.
Electron - answer A negatively charged particle that moves around the nucleus.
Element - answer A pure substance that cannot be broken down into simpler
substances by ordinary chemical means.
Elements are made up of one type of atom
Energy Level - answerA particular region where electrons can orbit a nucleus
Ion - answerAn atom that has an electrical charge because it has gained or lost
electrons.
An atom with more protons than electrons is a positively charged ion.
An atom with more electrons than protons is a negatively charge ion.
Isotope - answerOne of several forms of the same element.
Usually only one or two stable isotopes exist for a given element.
All isotopes in the same element has the same amount of protons, but differ in neutrons.
Mass Number - answerThe number of protons plus neutrons in the nucleus of and
atom.
Neutron - answerA particle with no charge located in the nucleus of an atom.
Periodic Table - answerA chart that organizes the chemical elements based on their
properties
Protons - answerA positively charged particle located in the the nucleus of the atom.
Valence Electrons - answerElectrons found in the outermost energy level of an atom.
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