Two atoms interact with each other as shown by the equation. Complete the equation by filling in the missing parts. 1
2
3
4
5
H Н.
He
Li
?H + He
H

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull