RSM Chp. Four
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| atom | is the smallest particle of an element
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| electron | the negatively charged particles
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| nucleus | a tiny region in the center of the atom
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| proton | positively charged particles in the nucleus
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| energy level | an electron's movement is related to the specific amount of energy in an atom
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| neutron | particle inside the nucleus of an atom with no electrical charge and the nearly the same mass as a proton
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| atomic number | the number of protons in the nucleus of an atom
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| isotope | atoms of the same lement that have different numbers of neutrons.
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| mass number | is the sum of the protons and neutrons in the nucleus of an atom
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| atomic mass | is the average mass of all the isotopes of an element.
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| periodic table | is an arrangement of the elements showing the repeating pattern of their properties.
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| period | the periodic table is organized in horizontal rows
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| group | the vertical columns of the periodic table consisting of elements with similar characteristic. Also known as a family
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| chemical symbol | is a representation of an element usually consisting of one or two letters
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| metal | are elements that are good conductors of electric current and heat
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| malleable | is a material that can be hammered or rolled into flat sheets or other shapes
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| ductile | is a material that can be pulled out, or drawn, into a long wire
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| thermal conductivity | is the ability of an object to transfer heat
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| electrical conductivity | the ability of an object to transfer electric current by free flowing electrons
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| reactivity | the ease and speed with which a substance reacts with other substances
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| corrosion | the gradual wearing away of a metal due to a chemical reaction
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| alkali metal | the metals of Group 1 from Li to Fr....so reactive that they are never found as uncombined elements in nature, only as compounds.
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| alkaline earth metal | the metals of Group 2 and are reactive, but less than Group 1
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| transition metal | the elements in Group 3 - Group 12. Most are never found uncombined in
nature
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| particle accelerator | move atomic nuclei faster and faster until they have reached very high speeds used in synthesizing new elements by colliding neulei
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| nonmetal | is an element that lacks most of the properties of a metal.
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| diatomic molecule | a molecule that consists of two atoms
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| halogen | means salt forming Group 17 F- astatine...
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| inert gas | Group 18 do ordinarily form compounds because atoms do not gain, lose or share elections and are highly un-reactive
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| semimetal | have properties of metals but also have properties that are typical of nonmetals.
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| semiconductor | substances that can conduct electric current under some conditions but not under other conditions
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| radioactive decay | the atomic nuclei of unstable isotopes release fast-moving particles and energy
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| radioactivity | spontaneously emits radiation
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| alpha particle | consists of two protons and two neutrons and is positively charged
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| beta particle | is a fast-mvong electron given off by a nucleus during radioactive decay
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| gamma radiation | constist of high-energy waves, similar to X-rays.
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| tracer | are radioactive isotopes that be followed through the steps of a chemical reaction or industrial process.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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.
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:
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