Earth's oceans contain many dissolved elements like calcium, sodium, and chlorine. these elements plus several others combine to form the salts in the oceans. what is a major source of calcium and sodium in oceans? a) air pollutants b) gases from active volcanoes c) minerals dissolved in aquifers d) weathering and erosion of rocks

the answer is D) weathering and erosion of rocks. i took the test.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.