Answer:
The correct answer is:
d. Cocaine, the first topical anesthetic drug, was introduced in 1880.
Explanation:
It is certainly true that Cocaine was introduced in the medical field for its anesthetic use in 1880, nevertheless it was not the first topical anesthetic drug used by medicine. The first discovery about anesthetic purposes was in 1844 with the use of nitrous oxide. Later on, ether was introduced to the field of anesthetics in 1846, and finally specialists talked about chloroform in 1847 before the later use of cocaine as anesthesia in the medical spheres.
1. if not already open, open the lid
2. place clothes in, around the central circular shape
3. pour in detergent wherever detergent is incerted
4. close lid and set the desired setting
5. start the washing cycle!
La capacidad de enlace del carbono se debe a que tiene en su orbital externo cuatro electrones monovalentes los cuales facilmente pueden crear lazos estables con otros elementos quimicos u otros carbonos.
El carbono tiene por este motivo elevadas posibilidades de cambinaciones consigo mismo y con otros elementos y por lo tanto, de esta manera da lugar a una gran cantidad de compuestos estables.
La configuracion electronica del carbono is la siguiente:
6C = 1s2, 2s2, 1p1x, p1y, 2p0z
Su numero atomico es 6, en consecuencia, tiene completo el primer nivel de energia pero sin embargo, en el segundo nivel solo tiene 4 electrones, debido a esto el carbono debe compartir los electrones externos en enlaces covalentes para lograr la configuracion de un gas noble.
Esto esta basado en la teoria de la hibridacion de los orbitales
People in North America tend to be more cube-like to fit the weather, while the people in South America tend to be tall and thin. The south grows more food than the north. People from South America tend to have darker skin colors than in North America.
Answer:
Asking questions you know the children can answer
Explanation:
Giving easy work isn't teaching children anything if you give them more difficult work it challenges their brains to work harder therefore teaching them while they also feel successful for identifying the answer
