An element that has a low first ionization energy and good conductivity of heat and electricity is classified as a
(1) metal (3) nonmetal
(2) metalloid (4) noble gas

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

What is the formula that this ionic compounds could form sr2+p3-o2-

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?