science unit 4 def.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| atomic mass | average mass of one atom of an element.
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| periodic table | a chart where all elements are organized into periods and groups according to their properties.
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| chemical symbol | one-or-two letter code that stands for and element.
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| period | a row of elements in the periodic table arranged by atomic mass.
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| group | column of elements in the periodic table, in which elements have certain properties in common.
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| matter | the material that all objects and substances are made of.
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| element | substance that are the building blocks of all matter.
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| compound | matter made of 2 or more elements the elements in a compound are chemically bonded.
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| atom | smallest particle into which and element can be divided and still have properties of that element.
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| electron | negatively charged particle found outside the nucleus of an atom.
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| nucleus | the center of an atom.
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| proton | positively charged particle located in the nucleus of an atom.
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| neutron | in an atom particle with a neutral charge located in the nucleus.
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| energy level | the amount of energy carried by an electron in an atom.
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| isotope | atoms of the same element with different numbers of neutrons in an atom.
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| mass number | amount of matter in something.
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| atomic number | number of protons in the nucleus of 1 atom.
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| metal | element that is made of a hard wearable element to make jewelry or even cars.
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| malleable | can be molded in to shapes.
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| ductile | a term used to describe a material that can be pulled out in to a long wire.
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| conductivity | the ability of an object to transfer heat or electricity to another object.
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| reactivity | the ease and speed with which an element combines, or reacts with other elements and compounds.
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| corrosion | the gradual wearing away of a metal element due to chemical reaction.
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| alkali metal | an element in Group 1 of the periodic table.
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| alkaline earth metal | an element in Group 2 of the periodic table.
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| transition | one of the elements in Group 3 through 12 of the periodic table.
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| alloy | a mixture of two of more elements, one of which is metal.
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| nonmetal | an element that lacks most of the properties of a metal.
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| diatomic molecule | an molecule consisting of two atoms.
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| halogen | an element found in Group 17 of the periodic table.
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| noble gas | an element in Group 18 of the periodic table.
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| metaloid | an element that has some characteristics of both metals and nonmetals.
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| semiconductor | a substance that can conduct electricity under some condition.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Paul Clark
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