Download Name: ______ Aim 36: Elements, atoms, compounds and miztures

Name: __________
Aim 36: Elements, atoms, compounds and miztures
1. When a mixture of water, sand, and salt is filtered, what passes
through the filter paper?
A) water, only
C) water and salt, only
B) water and sand, only
D) water, sand, and salt
2. What happens when elements chemically combine?
A)
B)
C)
D)
All elements retain their original properties.
New properties are formed.
Only metals retain their original properties.
New elements are formed.
3. When two or more different elements unite chemically, they form
a
A) compound
C) metalloid
Date: ____________
11. Undissolved solid particles could best be separated from a
solution by
A) settling
C) stirring
B) cooling
D) filtering
12. When a teaspoonful of sugar is added to water in a beaker, the
sugar dissolves. The resulting mixture is
A) a compound
C) a suspension
B) a solution
D) an emulsion
13. Draw two different compounds, one in each box, using the
representations for atoms of element Xand element Z given
below.
B) mixture
D) solution
b Draw a mixture of these two compounds.
4. Which substance is an example of a compound?
A) sulfur
B) sugar
C) helium D) iron
14. Water is
5. Which is the formula of a compound?
A) Ca
B) Cl
C) N
D) HF
6. Which substance can be broken down by a chemical change?
A) beryllium
C) water
A) an element
C) a mixture
B) a compound
D) a solution
15. Explain why:
B) boron
D) magnesium
7. Which substance can be broken down by a chemical change?
A) sodium
C) sulfur
B) argon
D) ammonia
8. What is the name for the compound NH4Cl?
A) nitrogen chloride
C) ammonium chloride
B) nitrogen chlorate
D) ammonium chlorate
16. Which material is a mixture?
A) water
C) methane
B) air
D) magnesium
17. Explain why:
9. The total number of atoms in one molecule of the compound K3
PO4 is
A) 7
B) 8
C) 3
D) 12
10. Which of the following is an example of a solution?
A)
B)
C)
D)
salt water
rocks and sand at a beach
iron filings and sulfur powder mixed together
a drop of pure water
18. How many atoms of each element are in the compound C6H12O6
? How many total atoms are there in this compound?