What is the maximum number of electrons that can be contained in the first energy level of any atom?

During which time interval does the object travel approximately 10 meters

The element that has the greatest electronegativity is

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.