The periodic table is a way to arrange the elements, in order of increasing _________, to show natural repeating patterns such as:
a. The increasing number of valence electrons as you go across each period
b. the decreasing size of the atom as you go across each period
c. the repeating change in reactivity as you go across the chemical families
d. the change from metallic to nonmetallic properties as you go across each period
2006-11-30 07:55:26 · 4 answers · asked by ♥ 6 in Science & Mathematics ➔ Chemistry
A) Valence Electrons
I believe b, c and d show the results of the grouping not the reason they're grouped that way to start out with...
b... No... The atom size increases instead of decreases
c... No...
c... No...
versa...
2006-11-30 08:13:22 · answer #1 · answered by Dave C 7 · 0⤊ 0⤋
increasing atomic number
its (b) because as the nuclear charge (atomic #) increases, it is able to hold its electrons closer to it, therefore the atoms decrease in size as you go across the periodic table.
2006-11-30 08:00:17 · answer #2 · answered by camm300 4 · 0⤊ 0⤋
"atomic number" is what goes in the blank
2006-11-30 08:00:51 · answer #3 · answered by j3nzsrfs 1 · 0⤊ 0⤋
a
2006-11-30 07:57:40 · answer #4 · answered by cashewcracker 1 · 0⤊ 0⤋