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chapter 17 test

QuestionAnswer
what is the order of elements based on the periodic table increasing atomic number
what do atoms of the same period and group have in common periodic energy levels valence electrons
where are metals found on the periodic table bottom left
where are non metals found in the periodic table on the right side toward the upper right corner
where are metalloids found in the periodic table along a slanted line between the metal elements and nonmetal elements
what happens to the elements on the periodic table as you move left to right and top to bottom atomic radius generally decreases as you move from left to right across a period
what did anton menedeleev create he created the first periodic table based on atomic mass
what is the periodic table based on currently atomic number
what is periodic law a law stating that the elements, when listed in order of their atomic numbers fall into recurring groups, so that elements with similar properties occur at regular intervals
what are the three main groups of elements metals, nonmetals and metalloids
what are the 5 families of elements Alkali metals. Alkaline earth metals. Transition metals. Halogens. Noble gases.
what are the properties of alkali metals high thermal and electrical conductivity, lustre, ductility, and malleability
what are the properties of alkaline earth metals Relatively soft and strong. The elements readily form divalent cations The alkaline earth metals are very reactive
what makes an object more reactive having less valence electrons
what are the properties of transition metals they are good conductors,bent into shape easily, have high melting points,have high densities.
what are the properties of Halogens. ow melting and boiling points, high electronegativities, and are sparingly dissovable in water.
what are the properties of noble gases Noble gases have very low melting and boiling points. They are non-reactive in their natural state and commonly known as inert gases.
all metals form positive charges all metals form positive charges
what is inert gases a gas which does not undergo chemical reactions under a set of given conditions.
what makes metals different from non metals Metals tend to be shiny, are solid at room temperature (apart from mercury), are malleable, ductile and have a high melting and boiling point
what makes non metals different from metals dull and do not reflect light, their states at room temperature vary, they are brittle and have relatively low melting and boiling points.
what are valence electrons electrons that located in the outermost electron shell of an atom
what are metalloids also know as semi conductors
The lower the number of valence electrons the more reactive
Created by: user-1779897
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