B) Ag because it’s in the middle of the periodic table.
Answer:You can view more details on each measurement unit: molecular weight of BaCl2 or grams This compound is also known as Barium Chloride. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles BaCl2, or 208.233 grams.
Explanation:
Answer:the first column has one valance electron the second has 2 and so on.
The only exception is helium that has 2.
Explanation:
The factors that can determine the outcome of a "neutralization reaction" include:
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1) temperature;
2) concentration (of the solution);
3) type of acid used;
4) type of alkali used;
5) type of reaction;
(e.g. whether the reaction is "endothermic" or "exothermic");
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Working out a star's age. Spectroscopy also tells us the age of a star by looking at the amount of its matter made up of chemical elements other than hydrogen and helium. "The earliest stars were composed of just hydrogen and helium because they were the first elements to form after the Big Bang".
