No plural for radium.
Radium is a highly reactive element that readily forms compounds with other elements. It reacts with oxygen to form radium oxide and with water to form radium hydroxide. Radium can also react with acids to form salts.
Energy in the form of rays
Radium is a highly reactive metal that readily reacts with water to form radium hydroxide. It can also react with air to form a black radium oxide layer on its surface. Radium is radioactive and undergoes radioactive decay to produce other elements.
When Radium-226 decays to form Radon-222, the Radium nucleus emits an alpha particle. The atomic number goes down by 2, and the mass number goes down by 4, matching the atomic number and mass number of the alpha particle.
Radium oxide has never been characterised. As radium is group 2 metal with chemistry like barium, radium oxide is expected to be ionic.
When radium-226 decays to form radon-222, the radium nucleus emits a alpha particle.
Radium is a highly reactive element that readily forms compounds with other elements. It reacts with oxygen to form radium oxide and with water to form radium hydroxide. Radium can also react with acids to form salts.
Energy in the form of rays
Radium is a highly reactive metal that readily reacts with water to form radium hydroxide. It can also react with air to form a black radium oxide layer on its surface. Radium is radioactive and undergoes radioactive decay to produce other elements.
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "was" is "were."
The plural form of "I" is "we."
"Groceries" is the plural form of "grocery."
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.