Bang tuan hoan Mendeleev se co them hai nguyen to moi

Cac nha khoa hoc Nga va My vua tong hop thanh cong hai nguyen to “sieu nang“ moi va du dinh xep chung vao vi tri cuoi cung trong bang tuan hoan cac nguyen to hoa hoc (bang tuan hoan Mendeleev).

14:17 03/02/2004

Bang tuan hoan cac nguyen to hoa hoc Mendeleev co the se co them mot nguyen to moi. Cac nha khoa hoc tai Phong thi nghiem quoc gia Lawrence Livermore (California, My) va Vien Nghien cuu nguyen tu Dubna (Nga) tuyen bo vua tao ra mot loai nguyen to sieu nang chua tung duoc biet..

04:07 18/10/2006

Phien ban moi cua bang tuan hoan cac nguyen to hoa hoc

Bang tuan hoan cac nguyen to hoa hoc luon can thiet doi voi hoc sinh, sinh vien tham khao cho mon Hoa hoc, Hien co nhieu phien ban dien tu khac nhau cua bang tuan hoan nay, trong do, moi nhat la Periodic Table 3.3.

11:45 02/11/2007

Bang tuan hoan cac nguyen to hoa hoc

Hoa hoc, bo mon khoa hoc tu nhien quan trong ma moi hoc sinh trung hoc deu phai hoc qua. Va bang tuan hoan cac nguyen to hoa hoc chinh la nguoi ban dong hanh than thiet cua moi hoc sinh. Thoi cong nghe thong tin, bang tuan hoan cac nguyen to hoa hoc da duoc so hoa thanh nhung..

15:43 31/12/2006

Phien ban moi cua bang tuan hoan cac nguyen to hoa hoc

Bang tuan hoan cac nguyen to hoa hoc luon can thiet doi voi hoc sinh, sinh vien. Hien nay, co rat nhieu phien ban dien tu khac nhau cua bang tuan hoan nay, moi nhat la Periodic Table 3.3 duoc phat hanh cuoi thang 10 vua qua.

09:31 12/11/2007

Thi tot nghiep THPT Duoc mang gi vao phong thi

Bo Giao duc va Dao tao vua cong bo danh sach nhung vat dung, tai lieu thi sinh tham du ky thi tot nghiep Trung hoc pho thong (THPT), bo tuc THPT nam 2007 duoc phep mang vao phong thi. Thi sinh nao vi pham se bi dinh chi thi trong ca 2 dot. Nhung vat dung, tai lieu duoc phep mang..

14:05 09/05/2007