Changes In Matter And Types Of Matter Flashcards
(15 cards)
All elements and compounds are pure substances because
There is 1 kind of atom only and there is a common ratio throughout
Mixtures can never be pure substances because
There are several kinds of atoms and no common ratio throughout
Elements
Smallest unit: “Atom”
Orbital - elections (-) and protons (+), Nucleus - neutron (+-)
Molecules
2 ore more atoms of the same element bonded together by a chemical bond (chemical energy)
Homogenous
Compound
2 or more different atoms present and bonded together
Common ratio of atoms/molecules
Pure substance
Can be broken down evenly or a single part of a mixture
Made of only one kind of particle, can be elements or compounds but same substance throughout
Mixture
Some elements are chemically bonded and some aren’t, single atoms/molecules AND compounds are present
Arbitrary distribution
Do not bond chemically
Chemical change
New product has been created
Irreversible
Physical change
Shape, state of matter, 5 senses change
Reversible
Homogenous
Contents uniformly distributed throughout mixture, 2 or more atoms from same elements
Heterogenous
Contents not uniform or have localized regions, 2 or more atoms from different elements
Solid, liquid, gas movement
Solid- move in place
Liquid- move around eachother
Gas- Freeform, high thermal E
5 examples of homogenous mixtures
PURE air
Water
Steel
Salt
Detergent
5 examples of heterogenous mixtures
Sand
Concrete
Oil and vinegar
Salad
Mud
Laws of Chemical change
Color change, formation of precipitate, formation of gas, odor change, temp change, light is produced,
