Potassium, Boron, Lead, Gold, Plutonium, Uranium, Francium
Uranium can react with a variety of elements such as oxygen, hydrogen, chlorine, and fluorine. These reactions can result in the formation of different uranium compounds with varying properties.
Uranium is a reactive metal having a Pauling electronegativity of 1,38; uranium react with the majority of other chemical elements. Also uranium can form many alloys.
Boron is typically considered to be a reactive element, as it readily forms compounds with other elements due to its electron configuration. It can react with oxygen, halogens, and metals to form various boron compounds.
Two common metals used as nuclear fuels are uranium and plutonium. Uranium is the most widely used fuel in nuclear reactors, while plutonium is used as a fuel in some types of reactors, such as fast breeder reactors.
Boron is lighter than carbon and uranium.
Boron can react with oxygen to form boron oxide, with halogens to form boron halides, and with metals to form metal borides. It can also react with certain acids to form boron-containing compounds.
Salt, because it's a compound. Uranium, boron, and hydrogen are elements.
Uranium does not belong as it is a metal, while salt, boron, and hydrogen are nonmetals.
The boron family includes elements such as boron and aluminum that react with oxygen to form oxides. They also react with acids to release hydrogen gas. Additionally, some members of the boron family can react with water to form hydroxides.
Boron does not react with water at room temperature. However, when heated, boron reacts with water to produce boric acid and hydrogen gas.
Uranium doesn't react with noble gases.
Uranium does not belong in this group because it is a radioactive element, while boron, salt, and hydrogen are all non-radioactive substances.
Boron primarily forms compounds with other elements through covalent bonding. It can react with oxygen to form boron oxide, with hydrogen to form boranes, and with metals to form borides. Boron can also react with halogens to form boron halides.
Boron does not react with sulfuric acid under normal conditions. Boron is relatively inert to sulfuric acid and does not readily form a reaction with it.
Uranium don't exist as a pure metal in ores; uranium react with many other elements.
Crystalline/solid boron does not react at all with sulfuric acid. However, finely powered boron will react with sulfuric acid but very slowly.