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WorksheetsUnit 5 - 5.1 & 5.2 Atom and Purity
Total questions: 65
Worksheet time: 1hrs 3mins
which of the following is not a pure substance?
sea water
salt
water
24-carat gold
What is the percentage purity of Gold in 18-carat Gold?
25%
50%
75%
100%
The silver ring has the mark 925 on it. What is the percentage of purity of Silver in the ring?
90%
92.5%
95%
925%
Diamonds are made of the element ....
Gold
Silver
Carbon
Boron
Blue Diamond is a diamond which has some ..... element on it.
Boron
Nitrogen
Nickel
Silver
Which compound mainly present in the salt coming from sea water?
sodium chloride
magnesium chloride
sodium sulfate
calcium chloride
What is a transition metal?
A metal that can change its state of matter at room temperature
A metal that is found in the middle of the periodic table
A metal that is only liquid
A metal that can only be found in outer space
Which state of matter is gold usually found in?
Solid
Liquid
Gas
Plasma
What is the symbol for gold in the periodic table?
Gd
Go
Au
Ag
The latin word for gold is (a)
Which of the following is a transition metal?
Helium
Iron
Neon
Oxygen
Which of the following is NOT a state of matter?
Solid
Liquid
Air
Gas
The purity of gold is measured in ______, __ carat gold is the purest
(a)
Transition metals have low melting points.
True
False
Why is gold valuable?
It is very common
It can change colors
It is rare and has unique properties
It is the only metal that is liquid at room temperature
Gold does not:
Conduct electricity
React with most chemicals
Exist in nature
Melt at room temperature
Gold is often found in:
The air
Rivers
Volcanoes
The ocean floor
What is the atomic number of gold?
29
79
47
82
Which of the following is NOT a characteristic of gold?
It is shiny
It is brittle
It is valuable
It is rare
Which of the following is a use of transition metals?
Making balloons float
Making jewelry
Making ice cream
Making paper
Transition metals are good conductors of electricity.
True
False
Which transition metals are precious metals?
Iron, copper, and zinc
Nickel, cobalt, and manganese
Aluminum, titanium, and chromium
Gold, iridium and platinum
Which transition metal is liquid at room temperature?
(a)
Most transition metals are what color in their pure form?
Red
Green
Blue
Grey
Outline Iceland on the map
Outline Iceland
What does chlorination do to the water?
Removes microorganisms
Cleans the water
Makes the water taste nice
Removes twigs and sediment
Which of these particles is NOT able to pass through a sand, gravel, and charcoal filter?
bacteria
water
viruses
large piece of dirt
Which of the following is the best method of obtaining pure water form seawater?
Separating funnel
Chromatography
Simple dilstillation
Filtration
People must have _______ to drink in order to survive.
frozen water
clean water
contaminated water
polluted water
What is the best way to purify water?
Add salt
Put inside the refrigerator
Filtration or Boiling
Find a very clean stream of water
What does chlorination do to the water?
kills microorganisms
Cleans the water
Makes the water taste nice
Removes twigs and sediment
methods of water purification are
Boiling, filtration, Chlorination and distillation
Boiling, filtration, evaporation and condensation
Boiling , filtration, condensation and distillation
Boiling, filtration, screening and chlorination
Which of the following methods can kills microorganisms?
chlorination and distillation
boiling and filtration
boiling and chlorination
filtration and distillation
What is the simplest water purification method?
Decantation
Sedimentation
Boiling
Chlorination
Which of the following method of water purification kills germs?
Sedimentation
Decantation
Filtration
Chlorination
What is the full form of RO used in water purifier?
Reactive oxygen
Reverse osmosis
Reactive osmosis
Reverse oxygen
Is water purified by Solar Purification good to health.
Yes
No
In the process of adding chemicals to water, the most common chemical used is called (a) .
In the process of adding chemicals to water, the most common chemical used is called (a) .
How much time is advised to boil water ?
(a)
What is the purity of silver marked 800?
100%
80%
3.5%
800%
What is the correct equation to calculate purity if the mass of the pure product is 10 g and the mass of the impure product is 40 g?
Purity = 40 / 10 x 100
Purity = 10 / 40 x 100
Purity = 10 + 40 x 100
Purity = 40 - 10 x 100
]What is meant by pure?
A substance with a low concentration of one element
A substance with no impurities
A substance with multiple elements
A substance with a high concentration of one element
What is the purity of 12 carat gold?
12%
100%
50%
75%
What is the purity of 24 carat gold?
24%
75%
50%
100%
What other minerals that can change white diamond to blue diamond?
Nitrogen
Helium
Hydrogen
Boron
Yellow diamond is a diamond which has some ............ element on it.
Boron
Nitrogen
Nickel
Silver
Which compound mainly present in the salt coming from sea water?
sodium chloride
magnesium chloride
sodium sulfate
calcium chloride
What percent of the earth's water is salty?
97%
3%
70%
30%
What percent of the earths water is fresh?
97%
3%
70%
30%
The chemical formula of water?
02H
HO2
H20
OH2
What is filtration?
A method used to separate a solid from a liquid that dissolves in the liquid
A separating technique used to separate a mixture of a solid and liquid where the solid does not dissolve in the liquid
Water can be filtered by sand.
True
False
Many people in the world die from drinking dirty water.
True
False
Which of these are parts of the atom?
Protons, ProAthletes, Neutrons
Neutrons, Protons, Electrons
Mitochondria, Electrons, Protons
Oxygen
Which of these has a negative charge?
Proton
Neutron
Electron
Oatmeal
Where are electrons found?
Outside the nucleus
Under my bed
Inside the nucleus
Inside a proton
Which charge does a proton have?
Neutral
Negative
No charge- battery is dead
Positive
Neutrons have a ____________ charge.
Neutral, or no charge
Positive
Negative
Neutron? I don't know what that is!
Select which things are made up of atoms:
Orange juice
A desk
You and me
Grass
Match the following subatomic particles to their charge.
Proton
Positive Charge
Neutron
No Charge
Electron
Negative Charge
Which of the labeled structures is a proton?
a
b
c
Which of the labeled structures is a neutron?
a
b
c
