emilybomar7466
07.12.2020 •
Biology
Just as the Pleistocene was ending and Earth was warming, an event called the Younger Dryas plunged Earth back into one thousand years of cold temperatures. What is one leading hypothesis for the cause?
Question 19 options:
glaciation of Antarctica
"nuclear winter" due to asteroid impact over Greenland
glaciation of the Andes and Himalaya
burial of organic carbon decreasing atmospheric CO2
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Ответ:
The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.
Explanation: