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100
what is exothermic reaction
a chemical reaction that gives off heat
100
daily double ðĪŠðð
what is valency
refers to the number of bonds an atom can form
100
what is a catalyst
a substance which speeds up a chemical reaction without being charged with the reaction
200
what is Enothermic reaction
a chemical reaction that takes in heat
200
give an example of a physical change
a popsicle that melts in the sun but its still a popsicle because you could re freeze it
200
what is Anion
a negative charged ion
300
what is an ion
an atom or group of atoms that has become charged by gaining or loosing one or more electron
300
what are a few chemical reactions that occur all around us all day
digestion of food
plants using photosythesis
300
what is cation
a positive charged ion
400
what is a chemical reaction
an interaction between the atoms of 2 or substances where the atoms rearange to form two new molecules
400
how are covalent bounds different form ionic bounds
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Unit 6 Vocabulary Quiz (1)
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How are covalent bonds different from ionic bonds?
Covalent bonds share electrons. While Ionic bonds transfer electrons. Additionally, covalent bonds occur between two non-metals while ionic bonds occurs between a metal and a non-metal.
400
what is covalent bonding
a chemical bond between two atoms in which each atom shares an electron
500
what is ionic bonding
a strong chemical bond that is formed by the attraction between two ions of opposite charge
500
how is an ionic bond formed
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Unit 6 Vocabulary Quiz (1)
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How is an ionic bond formed?
Ionic bonds are formed when one atom looses an electron to become a cation, and one atom gains an electron to become an anion. The metal donates an electron and the non-metal accepts the electron.
500
what is metallic bonding
a chemical bond where positive metal ions form a lattice structure with freely moving electrons between them