Answer:
Calcium
Explanation:
It has 20 electrons to start, loses two to become Ca 2+, and is left with 18 electrons
The two first ones because it’s always the opposite
Explanation:
so for this u have to use this equation where
Moles = number of particle/6.02×10^23
= 3.045 × 10^24/6.02×10^23
= 5.0581
write it to 3 S.F so 5.06 moles
The haze is called smog, hope this helps, pls mark brainliest!