1. La configuración electrónica del elemento Z 13 es: A. 1s2 2s2
B. 1s2 1s2 1p6 3s1
C. 1s2 1p4 1d5
D. 1s2 2s2 2p6 3s2 3p1

Describe the interaction that occurs between two objects with the same electrical charge.

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.

What does a numerical subscript following an element in a chemical formula mean?