Which of these elements is a transition metal?
francium (fr)
beryllium (be)
chromium (cr)
gallium (ga)
bismuth (bi)

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

What can be found in the ionosphere