The elements listed in the choices are radioactive materials. These materials are very unstable because of the high neutron-to-proton ratio in the nucleus. Because of this, they spontaneously undergo nuclear reactions by giving off sub-particles in order to lower the ratio. They emit radiation in the form of alpha, beta or gamma.
Half-life is the length of time it needs to completely react half of the original amount. For example, it would take Bismuth 60.5 seconds to use up half of its amount. Therefore, the lower the half-life the faster the reaction is and the lesser the residual amount will be. With that being said, the answer would be Bismuth because it only takes seconds.
Answer:
the manage techniques for preparing for an earthquake are
Explanation:
I. go in the open place
ii. take first aid box
iii . listen to the radio for more information.
iv . do not rush to go out of a building , to avoid stampede. and many more
Answer:
los Andes, la sierra Madre, la Sierra Nevada de Santa MArta, el Macizo de Guyana, cadena costera del Pacifico.
Explanation:
Depende en que parte vivas, si vives en Suadamerica recomiendo hablar de Los Andes, y si eres de centroamerica o Mexico habla de las sierras madre.
Estas cadenas montanosas no son tan viejas a comparacion de otras. Aunque sus buenos millones de anos si tienen
The side opposite from the moon will also experience a high tide.
Answer:
both show the direction the wind is blowing. wind vanes and windsocks differ in shape.
Explanation:
