Examlex
Face validity refers to whether the items on a scale are easy to read and understand for test takers.
Atom
The fundamental unit of a chemical element, made up of a core of protons and neutrons, with electrons circling this core.
Elements
Pure substances consisting of only one type of atom, distinguished by their atomic number.
Simplest Form
The reduction of a fraction, equation, or expression to its most basic form, eliminating all complexities.
Compounds
Substances formed by the chemical combination of two or more elements in definite proportions.
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