Answer:
A part.
Explanation:
Because the reactants must be the exact same as the the products.
Answer:principle quantum number
Angular quantum number
Magnetic quantum number
Spin quantum number
Explanation:
Whats the question? I need to know to help....
c. the answer is radioactive elements are useful for dating materials
Elements in a group or a column have the same number of outer electrons so they have similar chemical properties
