Chapter 1 Flashcards
(38 cards)
What are the simplest substances?
Elements
What are the properties of the 2 forms of matter?
Physical properties and chemical properties
What happens to elements when they are chemically combined?
They form compounds having properties different from the Uncombined elements.
Does each substance in a mixture keep its individual properties?
Yes
Are parts of a mixture combined in a set ratio?
No
Matter?
Anything that has mass and occupies space
Chemistry
The study of priorities of matter and how matter changes
Substance
A single kind of matter that is pure and has a septic set of properties
Physical property
A characteristic of a pure substance that can be observed without changing into another substance
Chemical property
A characteristic of a pure substance that describes it ability to change into a different substance
Element
A pure substance that cannot be broken down into other substance by chemical or physical means
Atom
The basic particle from which all elements r made
Chemical bond
The force that holds two atoms together
Chemical formula
A formula that gives the element in a compound and the ratio of atoms
Heterogeneous mixture
A mixture I witch pure substance are unevenly distributed throughout
Homogeneous mixture
Substance (mixture)that evenly distributed throughout
Solution
An example of a homogeneous mixture forms when substances dissolve
Weight
A measure of the force of gravity on an object
Mass
A measure of how much matter is in an object
International system of units
The system of units used by scientists to measure the properties of matter
Volume
The amount of space that a object occupies
Density
The measurement of how much mass of a substance is contained in a given volume
Law of conservation of mass
The principal that the total amount of matter is neither created nor destroyed during any chemical or physical change
Temperature
A measure of the average energy motion of the partials of a substance
