Balance the following reaction _Na+_O2=Na2O

True or false, the three major scales used to measure earthquakes are mercalli scale, richter scale and magnitude scale

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

The reactions of photosynthesis occur in the of plant cell? a.mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll