Răspuns:
Mg are ``Z=12----> 12e=12p
A=24=p+n---> n=12
avand 12 sarcini pozitive(p) si 12 sarcini negative (e)- sarcina atomului este 0
A/Mg=24g/mol niu=m/A= 0,6g/24g/mol=0,025molMg
N,atomi=niuxN,A=0,025x6,023x10²³ atomi=0,15x10²³at
1atom.............12p
0,15x10²³at......n=1,8x10²³protoni
1s2 2s2 2p6 3s2
Nat=0,5molx6,023x10²³atom/mol=3,011x10²³ atomi
1atom................6e tip s
3,011x10²³at........n=18,002x10²³ e tips
1molMg..........24g............6x6,023x10²³e tip p
x........................3,011x10²⁰ eₙ
x=m=0,006gMg
Explicație:
