The diagram above shows the atomic emission line spectrum of hydrogen. The wavelength of each line is shown at the top of the li
ne. What does each line of the spectrum represent?
a) the color of the atom
b) the energy of a photon
c) the distance between orbits
d) the number of electrons
a) the color of the atom
b) the energy of a photon
c) the distance between orbits
d) the number of electrons
2 answers:
You might be interested in
<h2>Heptene formed is -</h2><h2>
</h2>
Explanation:
The two possibilities when the peroxide is not present
-
≡
→
+ HBr →
In presence peroxide,
≡
+ HBr →
- When peroxides are present in the reaction mixture, hydrogen bromide adds to the triple bond of heptane with regioselectivity.
- This reaction is opposite to that of Markovnikov's rule which says that when asymmetrical alkene reacts with a protic acid HX, then the hydrogen of an acid is attached to the carbon with more in number of hydrogen substituents, and the halide (X) group is attached to the carbon with more in number of substituents of alkyl.
- One mole of HBr adds to one mole of 1-heptane.
- The structure of heptene formed is -
<u>Answer:</u> The ion that is expected to have a larger radius than the corresponding atom is chlorine.
<u>Explanation:</u>
There are two types of ions:
- <u>Cations:</u> They are formed when an atom looses its valence electrons. They are positive ions.
- <u>Anions:</u> They are formed when an atom gain electrons in its outermost shell. They are negative ions.
For positive ions, the removal of electron increases the nuclear charge for an outermost electron because the outermost electrons are more strongly attracted by the nucleus. So, the effective nuclear charge increases for cations and thus, the size of the cation will be smaller than that of the corresponding atom.
For negative ions, the addition of electron decreases the nuclear charge for an outermost electron because the outermost electrons are less strongly attracted by the nucleus. So, the effective nuclear charge decreases for anions and thus, the size of the anion will be larger than that of the corresponding atom.
For the given options:
<u>Option a:</u> Chlorine
Chlorine gains 1 electron and form ion
<u>Option b:</u> Sodium
Sodium looses 1 electron and form ion
<u>Option c:</u> Copper
Copper looses 2 electrons and form ion
<u>Option d:</u> Strontium
Strontium looses 2 electrons and form ion
Hence, the ion that is expected to have a larger radius than the corresponding atom is chlorine.