An atom has 31 electrons 39 neutrons and 31 protons. it follows that its mass number is​

The three types is stress that act on earths rocks are compression, tension, and

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

Find the number of moles of argon in 364g of argon.