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Science vocab Yann

science vocab for Mrs. Williamson

QuestionAnswer
Law of Conversation states thay matter can not be created nor destroyed, it can only change from or be transferred
physical change occurs when one or more physical properties of a substance are changed; many physical changes can be undone by physical means.
chemical change occurs when two or m ore substances are changed into a new substacne , with different properties cannot be undone by physical means.
Element substance that are tge building blocks of all matter: an element is made up of one kind of atom.
chemical formula a way of describing the number of atoms that make up one molecule of a compound.
element molecule molecule of one type of atom.
compound molecule the element in a compound are chemicallly bonded.
chemical equation a way of writing changed in the arrangement of atoms durring a chemical reaction, using chemical symbols.
chemical reaction change that takes place when tow or more substances (reactants) interact to form new substances.
Reactants (in chemical equation) a compound or element that changes during a chemical reaction.
products (in chemical equation) compound or element that is the result of a chemical reaction.
coefficient in a chemical equation, the number placed in front of a chemical formula to balance the equation.
subscript tells the number of atoms in one molecule .
diatomic 2 atoms of the same elements bonded together.
Ionic compound chemical hand in which one or more electrons from one atom are transferred to another atom.
covalent compound a molecule formed by covalent bonds, in which the atoms share one or more pairs of valence electrons.
metallic compound A metallic compound is a compound that contains one or more metal elements.
synthesis The formation of a chemical compound through the combination of simpler compounds or elements.
decomposition A decomposition reaction is a type of chemical reaction where one reactant yields two or more products.
single replacement A single displacement reaction is a chemical reaction where one reactant is exchanged for one ion of a second reactant.
double replacement A double replacement reaction is a chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions.
Created by: c0403145
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