HS Science: Chemistry & Physics | Fun Learning Quest for Kid

You're analyzing an unknown element that has 6 valence electrons and forms a diatomic molecule with itself. Which group does this element belong to on the periodic table, and what type of bond holds the atoms together?

When balancing the chemical equation for the combustion of propane (C₃H₈), you notice that for every 1 molecule of C₃H₈, you need 5 molecules of O₂ to completely react. If you have 44.0 grams of propane (molar mass = 44.0 g/mol), how many grams of oxygen (molar mass = 32.0 g/mol) are required for a complete reaction according to stoichiometry?

You're studying a mystery substance that conducts electricity when dissolved in water and has a high melting point. Its atoms are arranged in a lattice held together by electrostatic forces. What type of chemical bond is primarily responsible for these properties?