Answer:
u will equate and make V2 the subject because it's the one u are looking for ....
I believe Winter is <span>your answer.</span>
Answer:
A- beryllium
B- calcium
C- magnesium
Explanation
NOTE: all element in group 2 have 2 balance electrons
First let’s start with B- number of electrons= number of protons which is equal to the atomic number. therefore, the answer is calcium as it’s atomic number is 20
C- magnesium will have three energy levels considering it has 12 electrons (2,8,2).
A- beryllium is the lightest one in group 2 as it has the atomic mass of 9.0122.
C nha
Hjhkhfkyfkdjtduditditdixyixi
