Atomic and Molecular Structure
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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| proton | A positively charged particle in an atom
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| neutron | A particle in an atom that has no charge
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| ion | A charged particle that is formed when electrons are gained or lost
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| isotopes | Atoms of the same element with different number of neutrons
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| atomic number | The number of protons in the nucleus of an atom
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| mass number | The sum of the number of protons and neutrons in an atom
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| atomic mass | The average of the masses in an element’s isotopes
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| oxidation number | A number that indicates an element’s charge
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| chemical bonds | A force that holds atoms together in molecules
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| ionic bonds | A bond formed by an electron transfer
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| electron | A negatively charged particle in an atom
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| covalent bond | A bond formed by sharing electrons
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| valence electrons | The electrons in the outermost energy levels often involved in bonding
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| periodic table | A chart in which elements are grouped according to their properties and increasing mass numbers
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| periods | The seven numbered horizontal ( > ) rows on the Periodic Table. Elements within each period have: 1- different chemical and physical properties 2- different number of electrons in the outer energy level 3- same number of energy levels
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| groups | The eighteen numbered vertical ( ^ ) rows on the Periodic Table. Elements in the same group have: 1- • similar chemical and physical properties 2- same number of electrons in their outer energy level 3- different number of energy levels
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| metals | Elements that are:1 - shiny 2- good conductors of heat & electricity 3 - malleable 4 - tend to lose electrons in chemical reactions 5 - are found on the left side of the Periodic Table
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| nonmetals | nonmetals - Elements that : 1 - lack luster (not shiny) 2 - are poor conductors heat and electricity 3 - are not malleable 4 - tend to gain electrons in chemical reactions 5 - found on the right side of the Periodic Table
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| noble gases | Relatively inactive inert elements found in group 18
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| Law of Conservation of Mass | A law that states that in a chemical reaction, the total mass of the reactants equals the total mass of the products
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| chemical reaction | A process in which bonds break apart and combine into new kinds of matter with different properties
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| reactant | The starting substances in a chemical reaction
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| product | The new substance(s) that are formed in a chemical reaction
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| precipitate | A solid that separates from a solution
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| activation energy | The energy required to break the bonds in a chemical reaction
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| exothermic reaction | A chemical reaction that releases energy
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| endothermic reaction | A chemical reaction that absorbs energy
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| chemical symbol | A one or two letter abbreviation for an element
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| chemical formula | A group of symbols that shows the makeup for a compound
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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.
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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:
Mrs G
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