A. involved in chemical reaction
B. interacts chemically
C. size of atom
D. outermost energy level
E. most reactive Group 1 metal
F. oxygen’s is –2
G. NO3 ¯
H. metal
I. noble gas
J. highly reactive nonmetal
2006-11-01 05:51:52 · 3 answers · asked by tom y 1 in Science & Mathematics ➔ Chemistry
F. Oxygen's is -2
Atoms are assigned numbers, called valence numbers, oxidation numbers, or oxidation states, which range in value from -4 through 0 to +7 and describe the combining behavior of the atoms in chemical reactions, particularly oxidation-reduction reactions. Metals, which commonly donate electrons and form compounds in which they exist in the positive, or cationic, state, are assigned positive oxidation numbers. For a metal such as zinc, which donates two electrons to achieve a stable electron configuration, the oxidation number is +2. Nonmetals, which commonly accept electrons and in compounds exist in the negative, or anionic, state, are assigned negative oxidation numbers. The oxidation number is -1 for chlorine and the other halogens, which accept one electron to complete their valence shell. The oxidation (valence) number is -2 for oxygen.
You can figure the oxidation (valence) number by looking at the column of the periodic table.
2006-11-01 05:58:17 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
A valence number is the number of electrons in the last energy levels of an atom. The electrons are counted from the s and p orbitals so the max number of valence electrons is 8. (s=2 p=6)
2016-05-23 03:42:35 · answer #2 · answered by ? 3 · 0⤊ 0⤋
what is the question?
2006-11-01 06:04:35 · answer #3 · answered by Girish.J. 2 · 0⤊ 0⤋