____________________ produces radioactive fragments that spontaneously shoot out fast-moving particles such as alpha and beta particles and gamma rays.

Fill in the blank(s) with the appropriate word(s).


Nuclear fission

Environmental & Atmospheric Sciences

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The valence shell is the

A. shell of electrons in an atom that is the least reactive. B. last partially filled orbital in an atom. C. outermost shell of electrons in an atom. D. shell of electrons in element V (atomic no. = 23). E. same as the orbital configuration.

Environmental & Atmospheric Sciences

What change would most likely cause a mineral deposit to become an ore?

Environmental & Atmospheric Sciences

Drainage basins are separated by the ________

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

Though acute hunger may occur in the United States, chronic hunger is limited to the periphery

Indicate whether this statement is true or false

Environmental & Atmospheric Sciences