shemical composiftions Flashcards
What is a pure substance
single substance not mixed with anything(elements and compound)
What is an impure substance
it is a mixture
WWhat are elements
simplest pure substance, basic clocks of living and non-living matter that cannot be broken down into simpler substances by chemical means.
In periodic table, horizontal rows and vertical columms are claled and which have simmiliars proteties
horizontal-period
vertical=-groups
elelmetns in smae gorup have similiar [porperties
what are aotms
basic building blocks of matter as they are smallest possible units of a substance that still has its chemical properties and cannot be divided any further.
what is a molecule
it is molecule is formed when 2 or more atoms chemically combined togteher.
ellements are made up of only____ ____ of atoms
one type
metals are usually foun d on the ____ if the periodic table while non-metals are
left, right
what are compounds
made up of two or more ellememts that are chemicallt bonded together
characterist9cs of compouns
compositiojms of a compound doe snot vary
-constituent elemnets are present in fixed proportiion by mass
have diff properties fronm their constituent elemetnts
can only be separated by chemical methods not by physicla methods
what are mistures
two or more substances physically mixed together`
characteristics of a mixture
composition of a mixture varies
retain their respective properties
can be separated by physical methods
WHat are the 2 types of mixtures
Homogeneous mixtures, particles of each component in homogeneous mixtures are distributed uniformly.(seen as one thing)
heterogeneous mixture, particles of eaxh component in heterogeneous mixtures ar enot uniformly distributed.(can see diff stuff)
What is a solution
it is a homogenous mixture of two or more substances. In a solution, a solute dissolves into a solvent and they stay mixed together.
what is a suspension
it is a heterogeneous mixtur ethat contain substances that do not dissolve and the different parts will separate.
