Download to HW 1.2 ELEMENTS COMPDS

Name________________________________________
Period_____________
HW 1.2 ELEMENTS, COMPOUNDS, MIXTURES
1. LEARNING ELEMENTS
Complete the following table:
Symbol
Element
Name
Symbol
C
P
silicon
Element
Name
nitrogen
lithium
Symbol
Element
Name
Cu
O
Al
Au
Ne
Sn
Ag
Be
Element
Name
K
iron
mercury
helium
sulfur
cobalt
magnesium
iodine
Symbol
Zn
Ca
W
Mn
sodium
chlorine
Br
hydrogen
uranium
Ra
argon
2. CLASSIFYING AS ELEMENTS, COMPOUNDS, MIXTURES
Classify the following as an element(E), compound(C) or mixture(M):
Material
Salt
Block of iron
Glass of cola
Mercury in a
thermometer
Ice
Vinegar & oil
E, C or M
Material
Copper wire
Air with dust
Pure air
Aluminum foil
E, C or M
Brass
Rust
Material
Homogenized milk
Sugar
Sugar water
Neon gas in a neon sign
Blood
Sandy water
For the blank spaces below choose element, compound, or mixture.
3. Al is a(n) _________________. Draw a diagram of 10 atoms of Al.
4. Oxygen is a(n) ________________. Oxygen is diatomic.
This means that in its natural state oxygen always exists as
two atoms together. Draw a diagram of 10 particles of oxygen (O2).
5. Draw a diagram of 10 particles of the compound H2O. One
particle of H2O looks like this:
E, C or M
6. The diagrams below show particles of elements and compounds. Each circle represents an
atom of an element. Different color circles represent different elements. Match the
pictures A to E to the following questions.
A
B
D
C
E
(a) Which particle picture represents a mixture of two compounds? ____
(b) Which particle picture represents a pure compound? ____
(c) Which particle picture represents a mixture of an element and a compound? ____
(d) Which particle picture represents a pure element? ____
(e) Which particle picture represents a mixture of two elements? ____
(f) Which particle picture could represent pure water? ____
(g) Which particle picture could represent something dissolved in water? ____