Lớp 12

Các bài giảng, lý thuyết, chuyên đề và bài tập đề thi các môn học từ Toán, Văn, Anh, Lý, Hoá, Sinh, Sử, Địa, GDCD,… lớp 12 được soạn kĩ lưỡng và dễ hiểu nhất trên Lecttr

Chuyên đề: Đảo ngữ (kèm bài tập vận dụng)

Written by ngoclinhbui Tháng 3 22, 2021

Bài 45: Hóa học và vấn đề môi trường

<img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" class='avatar avatar-60 photo avatar-img' height='60' width='60' decoding='async'/>

Written by nnquin Tháng 3 17, 2021

Bài 44: Hóa học và vấn đề xã hội

<img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" class='avatar avatar-60 photo avatar-img' height='60' width='60' decoding='async'/>

Written by nnquin Tháng 3 17, 2021

Chương 7. Sắt và một số kim loại quan trọng

Bài 34. Crom và hợp chất của crom

<img alt='' height='60' width='60' data-src='https://lad9zobj9tobj.vcdn.cloud/wp-content/uploads/front-user-profile/1579090058_inbound759391256693419440.jpg' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://lad9zobj9tobj.vcdn.cloud/wp-content/uploads/front-user-profile/1579090058_inbound759391256693419440.jpg' class='avatar avatar-60 photo avatar-img' height='60' width='60' />

Written by vv Tháng 3 17, 2021

Chương 7. Sắt và một số kim loại quan trọng

Bài 36. Sơ lược về niken, kẽm, chì, thiếc

<img alt='' height='60' width='60' data-src='https://lad9zobj9tobj.vcdn.cloud/wp-content/uploads/front-user-profile/1579090058_inbound759391256693419440.jpg' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://lad9zobj9tobj.vcdn.cloud/wp-content/uploads/front-user-profile/1579090058_inbound759391256693419440.jpg' class='avatar avatar-60 photo avatar-img' height='60' width='60' />

Written by vv Tháng 3 17, 2021

Chương 7. Sắt và một số kim loại quan trọng

Bài 32. Hợp chất của sắt

<img alt='' height='60' width='60' data-src='https://lad9zobj9tobj.vcdn.cloud/wp-content/uploads/front-user-profile/1579090058_inbound759391256693419440.jpg' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://lad9zobj9tobj.vcdn.cloud/wp-content/uploads/front-user-profile/1579090058_inbound759391256693419440.jpg' class='avatar avatar-60 photo avatar-img' height='60' width='60' />

Written by vv Tháng 3 17, 2021

Trao đổi vật chất và năng lượng trong hệ sinh thái

Written by thieungocvy Tháng 3 12, 2021

Chương 7. Sắt và một số kim loại quan trọng

Bài 31: Sắt

Written by Callie Tháng 3 12, 2021

Chương 6: Kim loại kiềm/Kim loại kiềm thổ/Nhôm

Bài 27: Nhôm và hợp chất của nhôm

<img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" class='avatar avatar-60 photo avatar-img' height='60' width='60' decoding='async'/>

Written by nnquin Tháng 3 12, 2021

Bài 26: Kim loại kiềm thổ và hợp chất quan trọng của kim loại kiềm thổ

<img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" height='60' width='60' decoding='async' data-src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' class='avatar avatar-60 photo avatar-img lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=60&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g' srcset="https://secure.gravatar.com/avatar/74201731a0775d5937f2ce6da513a96d7a2011a06cff01243b6c4aaa12203e42?s=120&d=https%3A%2F%2Flecttr.com%2Fwp-content%2Fuploads%2F2019%2F07%2Fcropped-lecttr-icon-square-270x270.png&r=g 2x" class='avatar avatar-60 photo avatar-img' height='60' width='60' decoding='async'/>

Written by nnquin Tháng 3 12, 2021