A. properties which can be observed since it's what you're physically viewing
Answer:
Explanation:
Its just dangerous stuff can go in the air and harm others
The traditional calcium atom has twenty protons and twenty electrons making it neutral.
The calcium in the pic is a calcium ion so the number of protons and electrons are not equivalent.
Since it's 2+ that means the ion is positively charged and for that to happen electrons are away.
So 20-2=18
There are 18 electrons
The formula is SrCl2. hope this helps
= 2 × 23 + 2 × 52 + 2 × 16
= 182 grams
1 mole of weighs = 182 g
8 moles weigh = 8× 182
=
or