Answer:
Anything not on the periodic table is an element non example! ... So, for a substance to be an element, all of its atoms must have the same number of protons. Examples of elements include hydrogen, lithium, nickel, and radium.
Explanation:
The answer is A. Na
because it's<span /> 5,1391
Answer:
I think it's A or D im not sure which one..
Answer:
a zinc is the most reactive