C19 Terms Flashcards
chemical formula
A shorthanded way to tell the identity of a compound
empirical formula
Shows only the relative proportion of the elements
oxidation number (ON)
The number of electrons that a bonded atom or ion would have to gain or lose to return to its natural state
polyatomic ion
Can bond with other atomic or polyatomic ions to form ionic compounds
binary compound
Compounds of only two elements
Stock system
A Roman numeral comes after the mane of the metal
chemical reaction
Atoms are rearranged
chemical equation
Describes what happens during a chemical change
reactant
The formulas on the left side of the arrow
product
The formula on the right of the arrow
coefficient
Placed in front of a term in an equation
precipitate
When a solid product from a reaction settles out of solution
composition reaction
Reactions that combine
decomposition reaction
Reactions that break apart
single-replacement reactions
One element in a compound is replaced by anther
double-replacement reaction
Two compounds Swap cations
exothermic reaction
Reactions that release thermal energy
endothermic reaction
Reactions that absorb thermal energy
What information does a chemical formula provide?
The amount of atoms in a compound
Why do some elements have multiple oxidation numbers?
The oxidation numbers can vary
Which element is usually written first in a chemical formula?
The one which occurs first in the alphabet.
How can you determine the sign and value of the charge on a polyatomic ion?
Idk
How do you indicate the presence of more than one occurrence of a polyatomic ion in a compounds formula unit?
Idk
Name five signs that a chemical change may have taken place
A solid separates from a liquid mixture of chemicals. A gas is produced by means other than evaporation. A substances color changes permanently. The temperature changes. Light sound or anther type of energy is produced.
