compounds and mixtures Flashcards
what is a compound
a substance made of two or more elements that have been chemically combined in an exact proportion
who founded the law of fixed proportions
french chemist joseph lousie proust
true or false: a compounds properties ar similar to the elements that make it up
false
what shows a compounds chemical compound
its chemical formula
what is the smallest part of a compound
a molecule
molecule comes from latin for what
“small mass”
what is a molecule
two or more atoms that are held together by the energy in chemical bonds
what is covalent bonds
when atoms share electrons in their outermost energy level
what is an ionic bond
when ions carrying opposite charges attract to each other for neutrality
what is the movement of electrons called
conductivity
when do metallic bonds occur
when electrons move from one positively charged ion to another
where do hydrogen bonds occur
in polar molecules(positive and negative end)
what is a mixture composed of
tw or more substances that have not been chemically combines and can be physically separated
what is a homogenous mixture
one in which its components are not mixed equally
what is homogenous mixture
one in which its components are mixed equally
what is a solution
a homegenous mixture that is made of a solvent and solute
what does soluble mean
being able to be dissolved
what is the larger amount in a solution called
solvent
what is the smaller amount in a solution called
solute
what is solution in which there is a smaller amount of solute than solvent called
diluted
what is a solution in which the amount of solute is relatively greater than the solvent called
concentrated
what does it mean when a solution is saturated
the maximum of solute is dissolved in the solvent
what is solubility
the maximum amount of solute that can be dissolved in a solvent at a given tempature
what can solubility be increased by
the raising of tempature of the solvent, the crushing of the solute, and stirring vigorously
What is the universal solvent
water
