Elements, Compounds & Mixtures Flashcards
The basic unit of all matter is?
The molecule
What is the difference between an molecule, an atom and an element?
Elements are the bricks, atoms are the type of bricks and a molecule is the wall
A molecule is ____ or more atoms chemically bound together that are ______ & _______.
2, stable, complete
Molecules made from atoms of the same type are called?
Elemental molecules
What are the characteristics of metals?
Shiny/silvery, malleable, conductive
A pure substance which contains 2 or more elements chemically combined is called?
A compound
True or false, compounds can be separated into simpler substances by a physical process?
False
Organic compounds always contain _____ & are usually ______ & ______.
Carbon, large and complex
True or false, mixtures are easily separated into their parts? ie, compounds or elements?
True
Name 4 common mixtures?
Solutions, colloids, suspensions, emulsions.
The substance being dissolved is called?
Solute
The substance doing the dissolving is called?
Solvent. ie, water
Which mixture is usually clear, does not settle and can pass through filter paper but not semi-permeable membranes?
Colloids
What are the characteristics of a suspension?
Murky, settles, cannot pass through filter paper. “Shake before use”
Emulsions are?
Droplets of one liquid suspended in another liquid e.g oil in water
