Download A guided tour of the periodic table The periodic table groups

Egyptian American International School
Science Department
Grade 9 – Guided reading
A guided tour of the periodic table
1
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The periodic table groups ………………………………. elements together. This organization makes it easier to
predict the ……………………………….. of an element based on ……………………. They are in the periodic table.
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In the periodic table, elements are represented by their ……………………………. And are arranged in a
certain order. The order is based on ………………………………………………………………………………………………..
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The periodic law states that …………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………….......................................
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Horizontal rows in the periodic table are called ………………………………. Just as the number of protons an
atom has increases by one as you move from left to right across a period, so does ………………………………
…………………………………………
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Atoms in the same ……………………………, or column, have the same properties. Why?
………………………………………………………………………………………………………………………………………………………………..
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Why are atoms of group 1 elements reactive?
………………………………………………………..……………………………………………………………………………………………………..
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What is the process of ionization?
……………………………………………………………………………………………………………………………………………………………….
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Define:
An ion ………………………………………………………………………………………………………………………………………….
A cation ……………………………………………………………………………………………………………………………………….
An anion ………………………………………………………………………………………………………………………………………
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Explain how a lithium atom will react? (Group 1)
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Explain how a fluorine atom will react? (Group 17)
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Because the atoms have different structures, they have different ……………………………..
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What is the atomic number? …………………………………………………………………………………………………..
The atomic number also equals the number of …………………………………………………
The ………………………………………………… for a given element never changes.
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What is the mass number? ………………………………………………………………………………………..…………….
If fluorine has 9 p and 10 n, then the mass number of flurorine = …………………………………….
If oxygen has 8p and 8 n, then the mass number of oxygen = ………………………………….
Atoms of an element always have the same atomic number, but they can have different
………………………………………………………
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What are isotopes? ……………………………………………………………………………………………………………………..
…………………………………………………………………………………………………………………………………………………….
Isotopes of hydrogen:
Protium
Protons =
Electrons =
Neutrons =
The most common isotopes
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Protons =
Electrons =
Neutrons =
Also called ………………………………
Tritium
Protons =
Electrons =
Neutrons =
……………………… isotope, so it is
found least often.
Calculate the number of neutrons for the following isotopes.
35
Cl17
2
Deuterium
37
Cl17
235
U92
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Atomic masses are usually expressed in …………………………….
An atomic mass unit (amu) is …………………………………………………………………………………………………………………
Mass of protons = mass of neutrons = …………………….. while electrons have …………………………… mass.
The average atomic mass is ……………………………………………………………………………………………………………….
………………………………………………………………………………………………………..
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The average atomic mass of chlorine is 35.45 amu. This mass is much closer to ………. amu than to
……….. amu. Why? …………………………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………………………………………..