Chemistry, 03.04.2020 04:03 BigGirlsTheBest
Radium is a radioactive element that decays into radon gas. it’s a Tomic mass is 226. How many moles in 500 grams of radium?
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Chemistry, 21.06.2019 17:30
Supongamos que estás estudiando dos estrellas. ambas estrellas tienen la misma magnitud aparente, pero la estrella a tiene una magnitud absoluta mayor que la estrella b. ¿que puedes decir acerca de la distancia a la tierra de estas dos estrellas?
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Chemistry, 22.06.2019 06:00
Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.
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Radium is a radioactive element that decays into radon gas. it’s a Tomic mass is 226. How many moles...
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