3) _Na +
|H,80_ - _Na,304
_Na2SO4 + _H2

Explain why scientists use shared characteristics to make cladograms.

Which position represents spring in the southern hemisphere? a) b) c) d)

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