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Middle School: 6th, 7th and 8th Grade
Science
Periodic Table - What Is It?
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Q.1
The lightest chemical elements include _______.
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lead, mercury, copper and arsenic
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carbon, nitrogen and oxygen
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helium, hydrogen, lithium and beryllium
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earth, air, water and fire
Q.2
The periodic table only contains _________.
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protons
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chemical elements
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atoms
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electrons
Q.3
The means by which all chemical elements are organized based on their atomic number, electron configurations and their recurring chemical properties is called the _________.
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periodic table
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subatomic particles
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chemical reaction
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metalloids
Q.4
Of the confirmed elements ____ occur naturally.
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98
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114
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117
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118
Q.5
This is the distribution of electrons found in an atom or molecule.
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Catalyst
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Orbital fashion
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Synthesis
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Electron configuration
Q.6
The rows found in the periodic table are referred to as _____.
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molecules
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grids
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periods
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groups
Q.7
What are the four common elements?
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Helium, hydrogen, lithium and beryllium
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Earth, air, water and fire
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Elements 113, 115, 117 and 118
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Lead, mercury, copper and arsenic
Q.8
The number of protons in the nucleus of an atom is known as the _______.
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atomic number
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catalyst
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compounds
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electrons
Q.9
He has been credited with publication of the periodic table in 1869.
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Aristotle
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Robert Hooke
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Carl Linnaeus
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Dmitri Mendeleev
Q.10
The columns found in the periodic table are known as ______.
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atomic number
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groups
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grids
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molecules
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