Which of the following has the largest atomic radius?

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

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %

What element has similar physical and chemical properties as boron.