Which phrases describe radioactive elements? check all that apply. -occur in nature -decay at a constant rate -have a consistent number of particles - have a half-life that determines their rate of decay - release energy and particles to maintain radioactivity check all that hurry

The phrases that describe radioactive elements are;

-occur in nature

-decay at a constant rate

- have a half-life that determines their rate of decay

Radioactive elements are elements whose nucleus are liable to decay overtime followed by the release of energy (alpha particles, beta particles, or gamma rays) and conversion to different elements. Every element that has atomic number greater than 83 is radioactive. Most radioactive elements occur in nature. Examples include uranium, radium and thorium. Radioactive elements have a half-life that determines their rate of decay

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement