From your knowledge about the distribution of electrons in their shells and from the atomic number (in parentheses), indicate the most likely charge on the ion when this atom forms an ion. (Remember the 2-8-18 shell distribution.)
Hydrogen (1)

○+1
○-1
○2

Question

From your knowledge about the distribution of electrons in their shells and from the atomic number (in parentheses), indicate the most likely charge on the ion when this atom forms an ion. (Remember the 2-8-18 shell distribution.)
Hydrogen (1) 

○+1
○-1
○2

anonymous · Answer

it's o+1

anonymous · Answer

1: 17. The element is oxygen. the atomic number refers to the mass of the nuclues (9+8) 
2: the answer is 2 
3: Ionic. a covalent bond is where two atoms share a pair of electrons. One from each atom, Unless it is a dative covalent bond where one element provides both bonds 
4: Atomic number 
5: +1. Hydrogen would become H+ as the electron would be easily lost as there is only 1 proton therefore losing 1 electron would be easier than having 2. (so the S orbital would be hard to fill). haha its hard to explain :S 
6: Oxygen has can fill the first shell and only has 6 electrons (1s2, 2s2, 2p4) in the second shell. The second shell has a capacity of 8 (2 in the S orbital and 8 in the P orbital) therefor the most likely Ion to form would be -2 as 2 electrons (-ve) charge would be gained, to fill the shell. 
7: Not sure but I think its synthesis. 
8: Decomposition (again not sure)