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10.09.2021 •
Chemistry
HELP!!
Which of the following statements best explains why the atomic radius decreases from left to right across a period?
A.
The number of neutrons in an atom increases from left to right across a period, and they pull the valence electrons inward with greater force.
B.
The number of electrons decreases from left to right, so the electron cloud occupies a smaller volume.
C.
The charge of the nucleus of an atom increases from left to right across a period, so the valence electrons are pulled inward with greater force.
D.
The number of energy levels decreases from left to right, so the electron cloud occupies a smaller volume.
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Ответ:
Dioxins are a group of highly toxic chemical compounds that are harmful to health. They can cause problems with reproduction, development, and the immune system. They can also disrupt hormones and lead to cancer. Known as persistent environmental pollutants (POPs), dioxins can remain in the environment for many years.
Explanation: