Chapter 1 Questions Flashcards
(23 cards)
Liquids have a fixed volume but not a _____ ______
Fixed shape
Solids have a _____ volume and shape that result from the way their particles are arranged.
Fixed
______ have neither a fixed volume or shape
Gases
Changes of state are ____________
Physical Changes
_________ changes occur when the identities of substances change and new substances form
Chemical
Lost the five evidences of a chemical change
The evolution of gas The formation of a precipitate The release of absorption of energy Change in temp or the giving off of light energy Color change in the reaction system
Matter is anything that has ______ and _____
Mass and volume
_______ is the force produced by gravity acting on mass
Weight
___________ ________ of a substance can be determined without changing the nature of a substance
Physical Properties
List the physical properties
Texture, state,melting and boiling points
The density of an object is the ______ of the object ________ by the _______
Mass divided by volume
Lost density formula
Density = mass
———
Volume
The density of a substance is the _____ no matter what size the sample
Same
List a chemical property
Reactivity with oxygen, if it will burn etc
______ are joined to make matter
Atoms
A molecule keeps all of the ____ and _____ ______ of that substance
Physical and chemical
What elements exist as two atoms of the same element joined together
Diatomic
Pure substances that are not elements are _____
Compounds
Example of a subscript
H2o
Why isn’t water a mixture?
The hydrogen and oxygen atoms in water are chemically bonded which means they cannot be a mixture
What is a solid mixture?
An alloy
Hetro have _____ proportions throughout
Different
Homo have the _______ proportions throughout
Same
