Determine the number of protons and the number of electrons in Se. How do you find the total number of valence electrons? Identify the atom or ion with an atomic number of 56, a mass number of 137, and 54 electrons. Identify the atom or ion with an atomic number of 54, a mass numb...
Calculate the number of electrons that have a total charge of 1 coulomb. What is the formal charge on the oxygen atom in the structure below? a. -1. b. 0. c. +1. d. +2. Write electron-dot formulas for the following: a. NO^+. b. Si_2H_6. c. POBr_3. ...
Calculate for result, understanding that the formula is the molar concentration of the ion multiplied by the valence squared. Take {2*32} in the formula above for example. The 2 is the molar concentration of La (Lanthanum), the 3 is the valence of electrons of La, and the valence is sq...
An Se ion has a mass number of 78 and a charge of -2. Determine the number of electrons in this ion. What is the formal charge on the central atom in the most reasonable Lewis structure for XeOF4? a) 0 b) -1 c) +2 d) -2 e) +1 ...