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The Periodic Table
of the Elements has changed over the
past 150 years. During this time,
many elements have been added as
they were discovered. The elements
113, 115, 117, and 118 in Period 7
were named in 2016. Their official
names have been approved by the
International Union of Pure and
Applied Chemistry (IUPAC). The table
below lists the names, symbols, and
atomic numbers for these four
elements.
66
Identify the element in this table
that is located on the Periodic
Table of the Elements in the group
classified as noble gases.
| Answer--> Og,
oganesson or even Uuo |
67 Explain, in
terms of valence electrons, why
the elements nihonium and
tennessine would be expected to
differ in their chemical
properties.
| Answer-->
They have different numbers
of valence electrons. |
68 Describe the general
trend in first ionization energy
values as the five elements
above moscovium in Croup 15 on
the Periodic Table of the
Elements are considered in order
of increasing atomic number.
| Answer--> First
I.E. decreases |
69 State, in terms of protons,
why tennessine is listed before
oganesson in Period 7 on the
Periodic Table of the Elements.
| Answer--> Ts has 1
fewer protons than Og. |
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