Magnesium and Aluminum Mg & Al Explanation:Magnesium’s atomic mass is 24.31 and Aluminum’s atomic mass is 26.98.
Atomic m. Element Atomic no. Symbol 1.0079u Hydrogen 1 H 4.0026u Helium 2 He 6.941u Lithium 3 Li Additional information:- ★ Atomic number : The number of protons in one atom of an element is known as atomic number. Atomic number of an element = No. of protons in one atom of element.The atomic no. of element is denoted by the letter z .
1. Lutetium Atomic Number = 71 Atomic Mass = 174.97 u 2. Hafnium Atomic Number = 72 Atomic Mass = 178.49 u 3. Tantalum Atomic Number = 73 Atomic Mass = 180.95 u 4. Tungsten Atomic Number = 74 Atomic Mass = 183.85 u
Those Al. Si. P. i think
You should be able to locate them on the periodic table as long as you know which part the atomic number is and which part the atomic mass is.