Medal and Fan!! i have no idea why this is an algebra question..

Elements in the same (blank) have similar properties

Row
Column

Question

Medal and Fan!! i have no idea why this is an algebra question..

Elements in the same (blank) have similar properties 

Row 
Column

anonymous · Answer

@gelow @ganeshie8 @KlOwNlOvE @KamiBug

gelow · Answer

i am thinking it is b but give me one sec.

anonymous · Answer

ok

gelow · Answer

ok i am back and i was correct it is b

anonymous · Answer

okay thanks

gelow · Answer

no problem X)

anonymous · Answer

One more @gelow

gelow · Answer

ok

anonymous · Answer

An element with an atomic number of 11 and an atomic mass of 23 will have(blank)neutrons total.  

11
12
23

gelow · Answer

i think it is b but i am not sure

anonymous · Answer

dang it i cant get this wrong.

gelow · Answer

so i asked my mom and we both say that it is 12 b

anonymous · Answer

yes it's 12 neutrons are found by mass number- atomic number
protons are the atomic number and electrons are also the atomic number

anonymous · Answer

@gelow are you good with the periodic table?