Hydrogen H Helium He Lithiurn U Beryllium Во Boron B Carbon с Nitrogen Oxygen Fluorine N 0 Neon No Third shell Second sh

[answerhappygod]

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I read all the explanation in the above pic and I still don't
understand as I have no knowledge about chesmistry.
i have a test coming in like 3 hours
could anyone give me a simple trick for me to pick the answer in
a question like this?
don't have to explain the whole thing. i don't think i have time
for this now. thank you so much
(please do not write in cursive script. i cannot read)
Hydrogen H Helium He Lithiurn U Beryllium Во Boron B Carbon с Nitrogen Oxygen Fluorine N 0 Neon No Third shell Second shell First shell :: 30 : Sodium ..Na Chlorino Magnesium Aluminum Mg Silicon Phosphorus SP Argon JA Sulfur 10S Si CI WA !! : 1+ According to the abbreviated periodic table above, which of the following compounds is an ionic compound? pais INCORRECT My Answer Each of the chlorine (valence = 7) atoms forms a single covalent bond with the phosphorous (valence = 5) atom. HO INCORRECT Each of the hydrogen (valence = 1) atoms forms a single covalent bond with the oxygen (valence = 6) atom. MgF2 CORRECT Each magnesium (valence = 2) atom transfers one electron to each of the fluorine (valence = 7) atoms, forming ionic bonds. Molecules formed by the transfer of electrons are called ionic compounds. NH3 INCORRECT Each of the hydrogen (valence = 1) atoms forms a single covalent bond with the nitrogen (valence = 5) atom.