Elements, Compounds, Mixtures
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•
Chemistry
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10th Grade
•
Practice Problem
•
Medium
Aijiao Low
Used 8+ times
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12 Slides • 13 Questions
1
Elements, Compounds, Mixtures
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Learning Outcomes
recognize that substances be classified as elements, compounds and mixtures
state that elements are the basic building blocks of all matter
recognize that elements are classified according to their properties
classify elements as metals and non-metals based on their characteristic properties
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What are elements?
An element is a pure substance that cannot be broken down into any simpler substances by chemical method
An example of chemical method is electrolysis
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5
Multiple Choice
Which element is not a noble gas?
argon
helium
oxygen
neon
6
Multiple Choice
Which element is a halogen?
carbon
nitrogen
oxygen
fluorine
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The Periodic Table of Elements
Each element is represented by a symbol.
8
Multiple Choice
Which element has the symbol Na?
nitrogen
neon
sodium
nickel
9
Multiple Choice
Fe is the symbol for which element?
fluorine
francium
iron
xenon
10
Multiple Choice
What is the symbol for silver?
Ag
Au
S
Si
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Classifying elements by state at room temperature
11 elements are gases, e.g. nitrogen, oxygen and chlorine
2 elements are liquids, mercury and bromine
all other elements are solids
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13
Multiple Choice
Which of the following is the definition of an element?
It is a pure substance that can be broken down into simpler substances by chemical methods.
It is a pure substance that can be broken down into simpler substances by physical methods.
It is a pure substance that cannot be broken down into simpler substances by chemical methods.
It is an impure substance that cannot be broken down into simpler substances by chemical methods.
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Multiple Select
Select the statements that are true.
There are two elements that are gases and 11 elements that are liquids.
Two elements that are liquids at room temperature are mercury and bromine.
Elements in Group 0 are called noble gases.
Elements in Group I are called transition metals.
Elements in Group VII are called halogens.
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Classifying elements as metals and non-metals
Most metals are solids at room temperature. Exception: mercury is a liquid at room temperature.
Non-metals may be solids, liquids or gases at room temperature.
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Classifying elements as in the Periodic Table
Elements are arranged in order of the proton (atomic) number of the respective atoms.
Elements in the same group have similar properties (e.g. low density, are coloured, etc., reactive, etc.)
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Multiple Choice
Which of the following elements is not a gas at room temperature?
krypton
sulfur
nitrogen
chlorine
21
Multiple Choice
Metals are found on the left of the Periodic Table while non-metals are found on the right of the Periodic Table.
True
False
22
Multiple Select
Select the metals from the list below.
bromine
aluminium
titanium
lithium
silicon
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Multiple Choice
Mercury is the only metal that is a liquid at room temperature.
True
False
24
Multiple Select
Select the properties of non-metals.
good conductors of heat and electricity
brittle
usually dull and soft
ductile
25
Multiple Choice
Elements in the same period have similar properties.
True
False
Elements, Compounds, Mixtures
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