Answer:
B
Explanation:
I hope it helps you good luck
The last one would be false
The two notations that represent isotopes of the same element is the one that represented in option 1
The lower number is the number of protons while the upper number is the atomic weight
hope this helps
Answer:
MgBr2
Explanation:
On the periodic table, Magnesium has 2+ charge and Bromine has -1 charge.
You cross charges and get MgBr2
Mechanical energy = mass x acceleration due to gravity x height
= 1x9.8x10 = 98J
