Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
process in which one or more substances change to make one or more new substances
|
chemical reaction
|
|
|
in a ____ ____ the new substances will have different chemical and physical properties
|
chemical reaction
|
|
|
name the 4 signs of chemical reactions
|
color change; gas forms; precipitate forms; energy forms
|
|
|
solid substance that forms in a solution
|
precipitate
|
|
|
what happens to the chemical bonds when new substances are formed?
|
the molecules bump into each other, the bonds break, atoms rearrange, and new bonds are formed
|
|
|
combination of chemical symbols and numbers to represent a substance
|
chemical formula
|
|
|
_____ _____ show how many atoms of each kind are present in a molecule
|
chemical formulas
|
|
|
if it's used in a convalent compound, it uses ____ to help write a formula
|
prefixes
|
|
|
uses chemical symbols and formulas as a short cut to describe a chemical reaction
|
chemical equation
|
|
|
the things that you start with
|
reactants
|
|
|
the substances form in a reaction
|
products
|
|
|
atoms are never ___ or ___ in a chemical reaction, they're just rearranged
|
lost or gained
|
|
|
french chemist who stated the total mass of
reactants = total mass of products |
laveisier
|
|
|
a number that is placed in front of a chemical symbol or formula
|
coefficient
|
|
|
energy is used in the reaction (reactants)
|
endothermic
|
|
|
energy is a product of the reaction (product)
|
exothermic
|
|
|
name the 4 types of chemical reactions
|
synthesis, decomposition, single-displacement, double-displacement
|
|
|
reaction in which 2 or more substances combine to form 1 new compound
|
synthesis reaction
|
|
|
reaction in which a single compound breaks down to form 2 or more simpler substances
|
decomposition reaction
|
|
|
reaction in which an element replaces another element that is part of a compound. the products of ________ are a new compound and a different element
|
single-displacement reaction
|
