Answer:
Hydrogen-1
Explanation:
Not sure what kind of explanation is needed for your question, because it doesnt specify.
The easiest should be:
Average mass of an element is calculated as the sum of the multiplication of each isotope by its percentage
And the mass of the hydrogen is 1, therefore the more abundant is hydrogen-1
C. The design would not be cost-efficient; the plane would require more fuel due to increased thrust from higher drag.
Answer:
Physical Change
Explanation:
The bush is changing shapes, not changing what it is.
