作者: Ryan J. Moore

Lanthanum is a chemical element with the symbol La and atomic number 57. Lanthanum is a silvery white metallic element that belongs to group 3 of the periodic table and is a lanthanoid. It is found i …

Attention Deficit Hyperactivity Disorder (ADHD) has been considered as one of the most frequently diagnosed psychiatric disorders in children and adolescents. Nowadays it is becoming among one of the …