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8 Sci Periodic Table
8 Science Atoms, Elements, and the Periodic Table
Term | Definition |
---|---|
MATTER | Anything that has mass and takes up space. |
ATOM | Small particle that makes up most types of matter, the basic unit of a chemical element. |
LAW OF CONSERVATION OF MATTER | Matter is not created or destroyed, it only changes form. |
ELEMENT | Substance that can’t be broken down into simpler substances, made of only one kind of atom. |
ELECTRON | Negatively charged particle of an atom. |
NUCLEUS | Central part of the atom. |
PROTON | Positively charged particle in the nucleus. |
NEUTRON | Neutral particle in the nucleus. |
ELECTRON CLOUD | Region around the nucleus organized into shells or energy levels. |
ION | An atom in which the number of protons differs from the number of electrons |
PERIODIC TABLE OF ELEMENTS | Arrangement of the chemical elements ordered by their atomic number and chemical properties. |
ATOMIC MASS NUMBER | Total number of a chemical elements protons and neutrons. |
REACTIVITY | How easily an element will combine with other elements |
ATOMIC NUMBER | Number of protons in an atom. |
ISOTOPES | Atoms of the same element that have different numbers of neutrons. |
PERIOD | Arrangement of chemical elements in a series of rows with similar properties and electron orbitals. |
GROUP | Family of chemical elements in columns with similar chemical properties and number of valence electrons. |
METALS | Elements with a shiny or metallic luster and good conduction of heat and electricity. |
NONMETALS | Elements that are usually dull in appearance, and poor conductors of heat and electricity. |
METALLOIDS | Elements that have characteristics of metals and nonmetals |