For those statements that you mark as false, correct them in a non-trivial manner to make them true. Antoine Lavoisier disagreed with the concept of phlogiston and renamed Joseph Priestley s dephlogisticated air oxygen, meaning acid producer. Humphry Davy isolated a number of alkali and alkaline earth metals in the first decade of the 1700s.
All fusion reactions involving elements lighter than carbon are exothermic.
Those involving elements heavier than carbon are endothermic. Of phosphoric, arsenic, and arsenous acids, arsenous would be the weakest acid in aqueous solution because it does not contain any O-H bonds that can be attacked by polar water molecules. The predominant intermolecular forces involved in CHF 3 would be hydrogen bonds. The trend of their standard reduction potentials is inconsistent with the violence of the reactions of the alkali metals with water. Lithium is a better reducing agent than potassium but potassium and cesium have similar reducing properties.