Elements, compounds and mixtures Flashcards
What is a molecule?
It has 2 or more atoms joined together
Symbol for potassium
K
Symbol for iron
Fe
Symbol for silver
Ag
Symbol for lead
Pb
4 properties of metals
Luster, malleable, electrical conductor and ductile
Non metals are:
Brittle and dull
Iron + sulfur=
Iron sulfide
Tin + oxygen =
Tin oxide
Lithium + nitrogen =
Lithium nitride
Calcium + carbon + oxygen =
Calcium carbonate
Nickel + sulfur + oxygen =
Nickel sulfate
Appearance of iron:
Grey, shiny solid
Appearance of sulfur:
Yellow, dull powder
Properties of Iron =
Luster, malleable, magnetic, electrical conductor, heat conductor
Properties of Sulphur =
Non-magnetic, non-malleable, soft, poor conductor of heat and electricity
What smell does iron sulfide give off?
Rotten eggs smell
Description of an element
It contains only 1 atom. It cannot be simplified by chemical methods
Description of a compound
A material made up of two or more different elements that are chemically joined together
Description of a mixture
Two or more substances mixed together which are easy to separate
What is an atom?
The simplest part of an element that can exist on its own
Do non-metals conduct electricity?
No
Are metals usually shiny?
Yes
Do non-metals have a high or low density?
Low
Do metals have a high or low melting point?
High
Symbol for aluminium
Al
Symbol for calcium
C
Symbol for phosphorus
P
Appearance of copper:
Orange/brown, shiny, metal, bendy
Appearance of bromine:
Brown/dull
Appearance of magnesium:
Light grey, shiny, bendy
