The number is 25. The square root of 25 is 5 and 5x2 is 10 and then 10+5 is 15
Answer:
mostly gasoline in cars nowadays
Answer:
2Mg^+ +O2 right arrow 2MgO
Explanation:
Scientists developed symbols and gave the elements numbers to help organize the elements by their chemical properties. The periodic table helps identify the underlying chemical and physical traits of the elements.