The elements are polonium and radium
Answer:
B
Explanation:
The oxidation state is present in metals that have multiple oxidation states. Most transition metals have multiple oxidation states. Such as, Iron(II) and Iron (III).
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Keep studying and good luck in your stoichiometry test
Solvation is the process in which molecules of a solvent attract the particles of a solute.
Answer:
D - Balance the equation
Explanation:
A balanced chemical equation shows the number of moles, volume, or mass of a compound/molecule that combines with another in order to give some certain products.
To quantitatively follow how reactants combine to form some desired products, one must express the equation in a balanced form so as to be able to carefully measure the amount of matter and the moles involved in a specific reaction. In chemistry, such calculation falls under stoichiometry (stoicheon means atom and metron is measurement).