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All terms in this list:

Atom: Are basic building blocks of matter that make up everyday objects.

Proton: a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge
equal in magnitude to that of an electron, but of opposite sign.

Neutron: a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

Electron: stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

Necleus: The central and most important part of an object, movement, or group, forming the basis for its activity and growth.

Electron Cloud: -a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

Atomic number: the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Mass number: the total number of protons and neutrons in a nucleus.

periodic table: A table that labels elements

chemical symbol: A chemical symbol is a 1- or 2-letter internationally agreed code for a chemical element, usually derived from the name of the element, often in Latin. The first letter, only, is capitalised. ...

Average atomic mass: Is the sum of the masses of its isotopes each multiplied by its natural abudance

metal: a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity (e.g., iron, gold, silver, copper, and aluminum, and alloys such as brass and steel).

non metal: an element or substance that is not a metal.

metalliod: an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors.

Group: put together or place in a group or groups.

Period: a length or portion of time.

Element: ach of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, the number of protons in the nuclei of its

Compound: thing that is composed of two or more separate elements; a mixture.

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