No, the two isotopes of lithium-6 and lithium-7 are not equally common.
The more plentiful isotope would be lithium-7.
This can be easily demonstrated by assuming that both isotopes were equally common. If that were the case, the average atomic mass would be (6 + 7)/2 = 6.5 amu. Now compare that value if they were both equal to the actual value found in nature. The value found in nature is 6.941 amu which is heavier than the 6.5 amu that would happen if they were equally common. Since the natural value is heavier, that means that there has to be more of the heavier isotope than there is of the lighter one. Therefore lithium-7 is more common than lithium-6.
Answer:
Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce. For example, copper produces a blue flame, lithium, and strontium a red flame, calcium an orange flame, sodium a yellow flame, and barium a green flame. When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colors. Each metal gives a characteristic flame emission spectrum
Answer:
butan-2-ol
Explanation:
The reaction is of an alkene with water in acidic medium. This will give addition product where water will add on the alkene according to Markovnikov's rule.
However, as alkene is symmetrical,w we will get single addition product.
The steps will be
a) There will be protonation of alkene with the acid (the catatlyst), resulting in formation of carbocation.
b) the carbocation formed will be attacked by water molecule, following by deprotonation to give alcohol.
The reaction is shown in the figure.
88.5% is the correct answer according to my calculations.