Answer:
<em>The</em><em> name of the element is magnesium </em>
I Hope this is right if not so sorry :)
Answer:
A
Explanation:
A: Metals are ofthen the best conductors.
B: Metals and non-metals can be smooth or rough
C: Metals and non-metals can be hard to the touch
D: Metals and non-metals can float in water
The answer is 15 bc you multiply the coefficient but the subscript
Answer:
Average atomic mass of uranium = 237.97 amu
Explanation:
Given data:
Abundance of U-234 = 0.01%
Abundance of U-235 = 0.71%
Abundance of U-238 = 99.28%
Average atomic mass of uranium = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (234×0.01)+(235×0.71)+(238+99.28) /100
Average atomic mass = 2.34 + 166.85+23628.64 / 100
Average atomic mass = 23797.83 / 100
Average atomic mass = 237.97 amu.
In order to balance out the Electrons, and give it a net charge of 0, you would need 79 Protons.
