Question

LA CHIMIE !!!!!!!!!!!!​

Answer 1

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: