Elements Compounds and MIxtures Flashcards
What is an ELEMENT?
An element is a substance that consiste of only one type of atom and cannot be broken down into sompler substances by chemical means.
What is an ATOM?
The smallest part of an element.
Name the element:
H
Hydrogen
He
Helium
Li
Lithium
Be
Beryllium
B
Boron
C
Carbon
N
Nitrogen
O
Oxygen
F
Fluorine
Ne
Neon
Sodium
Na
Magnesium
Mg
Aluminium
Al
Silicon
Si
Phosphorus
P
Sulphur
S
Chlorine
Cl
Argon
A
Potassium
P
Calcium
C
Iron
Fe
Silver
As
Gold
Au
Mercury
Hg
Copper
Cu
Zinc
Zn
Name 3 physical properties of metals.
Shiny/lustrous
Malleable
Sonorous
Ductile
High melting point
What does MALLEABLE mean?
can be hammered into shape
What does SONOROUS mean?
Rings when struck
What does DUCTILE mean?
can be drawn out into wires
Name 2 properties of non-metals.
Dull
Poor conductors of electricity
Which NON-METAL is a good conductor of electricity?
graphite
What is a COMPOUND?
A compound is a substance that consists of 2 or more different elements chemically bonded together.
complete:
magnesium + oxygen
magnesium oxide
Describe how magnesium burns in air.
grey solid at start
burns with a bright light
forms a white ash
Describe how iron wool burns
grey solid
burns with orange sparks
forms a black solid
What is a moecule?
2 or more atoms chemically bonded together.
A;; compounds are made up of molecules.
True or False
True
Give an example of a compound.
H2O
What is a mixture?
Consists of 2 or more different substances that are not chemicslly bonded and can be easily separated.
Name 3 methods of separation:
Distillation
Filtration
Evaporation
Seaparating funnel
Chromatography
What is an ALLOY?
A mixture of 2 or more elements, at least one of which is a metal, and the resulting mixture has metallic properties.
Brass is an alloy. What is it made up of?
Cu and Zn (2 metals)
Steel
