How many valence electrons does strontium (sr) have?

In which phase(s) do the molecules take the shape of the container?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

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.