Answer:
Explanation:
12.00 g C-12 = 1 mol C-12 atoms = 6.022 × 1023 atoms
The number of particles in 1 mole is called Avogadro’s Number (6.0221421 x 1023).
6.022 ×1023 atoms
1 mol or 1 mol
6.022 ×1023 atoms
It might me b but I am not sure
The hydrogens and oxygen of a water molecule are held together by covalent bond
it's the third one The chemical equation will have two arrows pointing in different directions. !
Calcium fluoride.
Ca is metal, F is non-metal, so they form ionic bond.
Ca as metal can form only positive ion. Ca in the second group, so the charge of Ca ion is 2+. Ca²⁺
F is in the 17th group, so it has 7 electrons on the last level. It is non-metal, non-metal, so it has negative charge -(8-7)=-1. "8" because on the last level cannot be more than 8 electrons. F-ion is F¹⁻.
Ca²⁺ F¹⁻
Number of positive charges should be equal to number of negative charges,
Formula of calcium fluoride
CaF2.
2 atoms Fluorine bond with Calcium.
