He elements in group 17 of the periodic table are all called halogens. all halogens have the same. atomic number. atomic mass. number of possible isotopes. number of valence electrons.

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?

When the water vapor cools it condenses select a number that represents his process on the

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a. the mitochondria b. the nucleus c. the vacuoles d. the endoplasmic reticulum