Which ion would represent the ion of an element from group 2a?

t^3+

x^2−

z+

e^2+

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

How do you lengthen a pattern piece? (family and consumer science, sewing)

What kind of intermolecular forces act between a hydrogen fluoride molecule and a hydrogen peroxide molecule? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.