Firstly, it provides flexibility and convenience, allowing students to access learning materials anytime, anywhere. This accommodates various learning styles and preferences, enabling self-paced progress. Additionally, blended learning encourages active student participation and engagement through interactive online platforms, promoting critical thinking and collaboration skills. Furthermore, it caters to personalized learning by offering individualized instruction and adaptive assessments, ensuring that students receive tailored support and challenges. Moreover, the incorporation of online resources and multimedia enhances content retention and understanding. Blended learning also fosters digital literacy and technological skills necessary for success in the digital age.

P (Z = 15): 1s22s22p63s23p3 Þ P có 5 electron hóa trị cần thêm 3 electron để đạt octet.

H (Z = 1): 1s1 Þ H có 1 electron hóa trị cần thêm 1 electron để đạt octet.

Khi hình thành liên kết, P góp chung 3 electron với 3 electron của 3 H ⇒ Trong PH3, xung quanh P có 8 electron giống khí hiếm Ar còn 3 H đều có 2 electron giống khí hiếm He.