Which trio of elements have the same number of valence electrons?
A. sodium (Na), hydrogen (H) and francium (Fr)
B. carbon (C), neon (Ne) and lithium (Li)
C. silicon (Si), arsenic (As) and boron (B)
D. iron (Fe), gallium (Ga) and helium (He)

Question

Which trio of elements have the same number of valence electrons?
A. sodium (Na), hydrogen (H) and francium (Fr)
B. carbon (C), neon (Ne) and lithium (Li)
C. silicon (Si), arsenic (As) and boron (B)
D. iron (Fe), gallium (Ga) and helium (He)

mikeymaximum · Answer

I HAVE 2 FINISH THIS TEST BY MIDNIGHT AND I'M ALMOST DONE...
BUT...
ITS PAST MY BED TIME (13) AND I NEED 2 GET DONE BEFORE MY DAD GETS HOME FROM WORK (WHICH IS SHORTLY)

matt101 · Answer

Elements in the same group (column) on the periodic table have the same number of valence electrons. Look at a periodic table, and you'll see that only the elements in option A can be found in the same group.

anonymous · Answer

https://www.google.com/search?q=periodic+table&espv=2&biw=1280&bih=891&tbm=isch&imgil=JsfFP8TdgDCmFM%253A%253BdOfeZddtTjcy2M%253Bhttp%25253A%25252F%25252Fwww.ptable.com%25252F&source=iu&pf=m&fir=JsfFP8TdgDCmFM%253A%252CdOfeZddtTjcy2M%252C_&ved=0CCYQyjdqFQoTCKvJ6PXNx8gCFUrRgAod7s4A0Q&ei=QUAhVuukKcqigwTunYOIDQ&usg=__RwOYVYNKSJlRvEf_PXp9anTpmoo%3D#imgrc=_&usg=__RwOYVYNKSJlRvEf_PXp9anTpmoo%3D