The scientist which was credited with first stating that electrons orbit an atomic nucleus was Niels Henrik David Bohr. He was the proponent of the Bohr model of the atom, wherein he states that energy level of electrons are distinct and that electrons revolve on stable orbits within the atomic nucleus but can actually transfer from one orbit (level) to another. The orbitals are called: s, p, d and f orbitals.
Answer: 1) 
2) 
3) 
4) 
Explanation:
According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.
1) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
2) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
3) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
4) 
Here, 
is loosing a proton, thus it is considered as an acid and after losing a proton, it forms which is a conjugate base.
Answer:
D.
Explanation:
CH₃C≡ CCH₂CH₂Cl
Since there are 5 carbons so the suffix used is "pent"
There is a triple bond so its alkyne
So the compound becomes 2-pentyne (2 because the triple bond is with the 2nd carbon)
Then,
The functional group of chlorine is attached with 5th carbon So the compound becomes
5-chloro,2-pentyne
There was no equipment to create temperature difference in the water
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