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Chemistry Definitions

100

A substance with atoms that are all alike

What is an element?

200

A substance formed from two or more elements

What is a compound?

300

A number you place in front of a compound to help balance the equation

What is a coefficient?

400

The new stubstance produced in a chemical reaction

product

500

a change in which one or more substances are converted into new substances

chemical reaction

Balance these equations

100

___ Mg + ___O₂ --> ____ MgO

2, 1, 2

200

____Fe + ___Cl₂ --> ___ FeCl₃

2, 3, 2

300

____ H₂O₂ --> ___ O₂ + ____H₂O

2, 1, 2

400

___Cu + ___ Ag(NO₃) --> ___ Cu(NO₃) + ____Ag

1, 2, 1, 2

500

__ Na(OH) + __CuCl₂ --> ___ Cu(OH)₂ + ___ NaCl

2, 1, 1, 2

Classifying

100

___ Mg + ___O₂ --> ____ MgO

Synthesis

200

____Fe + ___Cl₂ --> ___ FeCl₃

Synthesis

300

____ H₂O₂ --> ___ O₂ + ____H₂O

Decomposition

400

___Cu + ___ Ag(NO₃) --> ___ Cu(NO₃) + ____Ag

Single replacement

500

__ Na(OH) + __CuCl₂ --> ___ Cu(OH)₂ + ___ NaCl

double replacement

Ionic or Covalent?

100

sharing electrons

Covalent

200

transfering/"stealing" electrons

Ionic

300

NaCl -metal and nonmetal

Ionic

400

H₂O -two nonmetals

covalent

500

A diagram showing how many valence electrons something has

electron dot diagram

Name Covalent

100

CO₂

carbon dioxide

200

NaCl

Sodium Chloride

300

PCl₃

Phosphorus tetrachloride

400

Dinitrogen Monoxide

N₂O

500

Dinitrogen Pentaoxide

Aluminum Oxide

N₂O₅

Al₂O₃