1. The density of a substance is a) a value and does not ever change even at dif
ID: 819880 • Letter: 1
Question
1. The density of a substance is
a) a value and does not ever change even at different temperatures.
b) the same for all mixtures made of the same pure substances.
c) changes based on the sample size.
d) is a physical property of a substance and can be temperature dependent.
2. Which of the following is a physical change?
a) The reaction of sodium with water to form sodium oxide
b) Frying an egg
c) Burning toast
d) Molding a piece of iron into a sword
3. Which of the following is a heterogeneous mixture?
a) Carbon dioxide (CO2)
b) Water
c) A mixture of blue and red balls
d) The air in this room
4. Chromium is a
a) Metal
b) Metalloid
c) Non-metal
d) Semi-metal
5. Most elements in the periodic table are
a) Solid
b) Liquid
c) Gas
d) Plasma
6. Which of the following exist as a diatomic molecule?
a) Oxygen
b) Sulfur
c) Lead
d) Calcium
. Compounds can be broken down/separated by
a) Physical means
b) Chemical reactions
c) Distillation
d) Very small tweezers
8. Which of the following is not a solid?
a) Carbon
b) Gold
c) Nickel
d) Argon
9. When water melts this is an example of a/an
a) Physical change
b) Endothermic process
c) Chemical change
d) Potential change
10. What describes the following symbol?
a) Os with 72 electrons and 76 protons
b) Os with 32 protons and 72 electrons
c) Ge with 32 protons and 36 electrons
d) Ge with 32 protons and 28 electrons
11. What is the average atomic mass for the following?
a) 273
b) 272
c) 271
d) 270
12. Which of the following are isotopes?
a) X and Y
b) X and Z
c) Y and Z
d) Z and R
13. What element will have the same charge as oxygen?
a) Sulfur
b) Nitrogen
c) Fluorine
d) Phosphorus
14. What subatomic particle is not found in the nucleus?
a) Electron
b) Proton
c) Neutron
d) Lepton
15. What is the name of ZnSO3?
a) Zinc (II) sulfite
b) Zinc (I) sulfate
c) Zinc sulfite
d) Zinc sulfate
16. What is the molecular formula for acetic acid?
a) CH3COOH
b) C2O4H2
c) CO3H2
d) CH3OH
17. What is the molecular formula for dibromine pentanitride?
a) 2Br5N
b) Br2N5
c) BrN3
d) Br2N6
8. The state of matter for an object that has a definite volume but not a definite shape is
a) solid state
b) liquid state
c) gaseous state
d) elemental state
e) mixed state
19. The state of matter for an object that has both definite volume and definite shape is
a) solid state
b) liquid state
c) gaseous state
d) elemental state
20. _________ are substances with constant composition that can be broken down into elements by
chemical processes.
a) Solutions
b) Mixtures
c) Compounds
d) Quarks
e) Heterogeneous mixtures
21. Which of the following statements is false?
a) Solutions are always homogeneous mixtures.
b) The terms
Explanation / Answer
1.a
2.b
3.c
4.c
5.b
6.a
7.a
8.d
9.d
10.a
11.c
12.b
13.a
14.b
15.a
16.d
17.b
18.b
19.c
20.a
21.a
22.c
23.b
24.d
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