Why does electronegativity decrease from right to left within a period? the sizes of the atoms increase. the sizes of the atoms decrease. the total positive charge in the nucleus increases. the total positive charge in the nucleus decreases?

Name the element in group 17, period 2. (periodic table)

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

How many moles of oxygen gas are produced from the decomposition of six moles of potassium