Señalar algunos aspectos que resulten similares u otros que resulten diferentes en la concepción actual que se tiene del átomo (modelo de la nube electrónica) y la que se tenía en los distintos modelos anteriores que se tenía del mismo. (lo siguiente es un cuadro) Modelo atómico Al igual que el modelo actual propone… A diferencia del modelo actual propone
Demócrito
Dalton
Thomson
Rutherford
Bohr

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

Drug abuse will not lead to physical and psychological dependence. true or false ?

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it