Chem chp 1 part 1

what is matter

anything that has mass and occupies space

what does mass measure

the amount of matter present

when the gravitational force acting on a mass it is measured by what

weight

what are the three physical states of matter

solid, liquid, and gas

what to we call characteristics when used in descriptions to define and describe objects 

properties 

when characteristic of a substance can be observed without changing the basic identity of the substance what type of property is it

physical

when characteristics of a substance describe the way a substance undergoes or resist change to form a new substance what type of property is it

chemical

what are some examples of physical properties

color, order, melting point

iron rusting when exposed to oxygen is an example of what type of property 

chemical 

the transformation of matter is called what

changes-which fall into 2 types

what type of change causes a substance to change its physical appearance but not its chemical composition

physical

what type change causes a process in which a substance undergoes a change in chemical composition

chemical

Rusting, corroding, digestion, decomposing are all key words of what 

chemical change occurring

pure substance and mixture are referred matter when talking about what

its chemical composition 

single kind of matter with fixed composition as well as fixed set of chemical and physical properties unable to be separated by physical means is called a what

pure substance

a physical combination of two or more pure substances in which each substance retains its own chemical identity has both a variable composition and a set of properties and can be separated by physical mean is what

a mixture

homogenous and heterogeneous are categories of what

mixtures

a mixture with a uniform set of properties throughout is called (only one/same properties)

homogeneous mixture

a mixture with regions of different properties

heterogeneous mixture

a pure substance that cannot be broken down into simpler pure substances by chemical means is called a what 

element substance

a pure substance that can be broken down into two or more simpler pure substances by chemical means is called

a compound substance

The smallest unit of life is called

atom

a group of two or more atoms that function as a unit because they are so tightly bound together are called

molecules

what is a diatomic molecule

molecule that contains two atoms

what is a triatomic molecule

contain three atoms

what is a polyatomic molecule

contains more than 3 atoms

a substance that exist as heteroatomic molecules is what

is a compound

a molecule that contains two different types of atoms/two different elements 

heteroatomic molecule 

a molecule that contains only one type of atom is referred to as what

homoatomic molecule