querline87
28.10.2020 •
Chemistry
FINISH THESE QUESTIONS ILL GIVE YOU
Write the symbol and name
for the cation formed when Symbol Name
(Example) A calcium atom loses two electrons Ca2+ calcium
A potassium atom loses one electron K+ Potassium ion
A zinc atom loses two electrons Zn2+ Zinc ion
A barium atom loses two electrons
Write the symbol and name for the anion formed when
(Example) A oxygen atom gains two electrons O2- oxide
A fluorine atom gains one electron
A sulfur atom gains two electrons
A nitrogen atom gains three electrons
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Ответ:
answer:
earth's surface warms up in the sunlight. at night, earth's surface cools, releasing heat back into the air. but some of the heat is trapped by the greenhouse gases in the atmosphere. that's what keeps our earth a warm and cozy 58 degrees fahrenheit (14 degrees celsius), on average.
explanation: