Unit 2 Flashcards
(12 cards)
What is Matter
Matter is anything that has mass and takes up space
What is a Element
A substance which cannot be separated into simpler substances.as a result of any chemical process
E.g silver metal, hydrogen gas, copper metal
What is a molecule
A group of two or more atoms joined together by chemical bounds
Eg water(H2O), ethanol (CH3CHO)
What is an Ion
An atom or molecule which possesses an electrical charge (+ or -)
E.g sodium ion (Na+) , chloride ion(Cl-),
What is a Practical
The general term to describe a small bit of matter such as an atom, ion or molecule.
Homogeneous mixtures
Consists of one phase. We cannot see the different parts.
Ex. Air, water, salt, a piece of iron, Kool aid
Heterogenous mixtures
More than one phase. You can separate mixtures by hand or with a magnet.
Define hand separation
Literally separating mixtures by hand or by using a magnet
Define Evaporation
Allowing liquid to evaporate or be boiled away, leaving the solid behind
Define chromatographyb
Small amounts of more than one coloured solid are present; the liquid present is not wanted
Fractional distillation
Heating the temperature at which one or more fractions of the mixture will vaporize.
Pure substance
