What is the difference between a family of elements and elements in the same period?

Answer 1

"Families" are elements in the same column in the table. (This means that the outer electron "shells" have the same number of electrons)
"Periods" are elements in the same row of the table. (This means that these elements have complete sets of electron shells up to those of the Inert Gas at the end of the previous Period)

Answer 2

The Na in NaCl is an similar sodium that is modern in that is organic and organic form. very few factors are modern of their organic and organic form with some exceptions (gold, silicon, etc..) to verify that a section to form a compound it may favor to form a bond and diverse bonds exist. contained in words of NaCL one electron is misplaced through the sodium and that is received through the chlorine. besides the actuality that one element loses in electrons it may favor to be received through the diverse element to verify that it to be balanced. you're able to not in any respect stumble on NaCl2 (both being a subscript). We do stumble on organic and organic oxygen round us yet that is extremely of a misnomer. Air because it exists round us is a mixture of many factors along with water vapor(H2O), O2, N2, etc.... factors as rapidly as certain into compounds are surely no longer easilly separated typically. some compounds are better positive than others. Their adjustments may be considered in quite and chemical adjustments interior the lab. as an example organic and organic O2 varieties a tremendous at an rather low temperature. as a results of very actuality of that is mixture with hydrogen to form water, it varieties a tremendous at a extra proper temp than organic and organic O2. there are countless adjustments. i do now no longer understand if this recommendations your question or if i go off on a tangent. O2 exists as a gas at room temp even as h2O exists as a liquid. yet that is putting ahead the obtrusive.