Explanation:
The mass written on the periodic table is an average atomic mass taken from all known isotopes of an element. This average is a weighted average, meaning the isotope's relative abundance changes its impact on the final average. The reason this is done is because there is no set mass for an element.
Answer:
13,308 MAYBE IF IT ISN'T IM SO SORRY
Explanation:
I used rise and run to see where point a lies .
That's kind of an answer you could you right?
The electron cloud model describe
s rapidly moving electrons.
We know they're in there somewhere, but we can't tell where. (That's NOT because they're too small. It's a fundamental rule of Physics that if we know something is moving fast, we can never measure its location accurately, no matter how good our measuring technology is.)
