None since CO3 does not exist.
First off chlorine is not a metal so you can ignore that one.
Sodium and Rubidium are in group 1 of the periodic table and Magnesium is in group 2.
Group one metals are more reactive than group two because it is harder for the group two metals to lose their 2 valence (outer most) electrons.
As you go down group 1 there is an increase in the reactivity this is because as you go down there is an increase in the atomic radius which leads to more shielding. This weakens the electrostatic forces of attraction making it easier to lose the outermost electrons, therefore they are more reactive.
Hey there!
We know that a chemical reaction is balanced when there is the same amount of each element on both sides of the equation.
According to the law of conservation of mass, matter cannot be created or destroyed, so we must have the same amount of each element on each side of a chemical equation.
We count the amount of each element on each side, and the products should have the same number as the reactants.
Hope this helps!
Molarity
Molarity is a unit used to express the concentration of a substance, and it is defined as the number of moles of solute per decimeter cubed (liter) of solvent.
Answer:
1. Magnesium + Oxygen --> Magnesium oxide
2.Iron + Oxygen --> Iron oxide
3.Copper + Oxygen --> Copper oxide
Explanation:
When an Element such as Magnesium or any other Elements are reacted eith Oxygen it forms an Oxide.
If you ever need the symbol equation here it is too :
1. Mg + O --> MgO
2.Fe + O --> FeO
3.Cu + O--> CuO
