Answer:
D.
Explanation:
Bohr's model represented electrons in their respective e⁻ shells. Only D fits the description.
The correct answer is B. False.
Narcotics have various use in the human body. No matter if the purpose of their use is killing pain, helping the patient to fall asleep easier, or helping the patient battle depression, there is always some danger in using them. Even though they have a different effect from drugs like cocaine and heroine, there are ingredients in many doctor-prescribed narcotics and medications who can lead to some sort of an addiction. In addition, lets not forget that the doctor cannot control how many pills are being taken per day.
Half-life is a first-order reaction which means the rate of decay is constant. Using the supplied value of the half-life of 14c (5715 years), and that the <span>piece of ancient charcoal contains only 20% as much of the radioactive carbon as a piece of modern charcoal, the calculated "age" or timespan when the tree got burned is </span>13269.819062281 or simply, 13270 years ago.
Answer:
the answer is d which is soap solution because it's a soap solution that can measure the degree of hardness of a water if the water forms with this soap solution then the water is hard but if the water forms foam with soap then it is soft
