Classify the following statements as True or False EXPLAIN YOUR CONSIDERATION IF
ID: 976584 • Letter: C
Question
Classify the following statements as True or False EXPLAIN YOUR CONSIDERATION IF FALSE. Anions are shorter than their parent atoms because they have more charges. The ionization energy is the energy required to create an anion Electron affinity is defined as the amount of energy released when an electron Is added to a neutral atom or molecule in the gaseous state to form a negative ion In general, electron affinity becomes more exothermic as you go from right to left across a period In Kinetic - Molecular theory the forces neglected are the attraction forces According to Kinetic-Molecular theory temperature is directly proportional to the square of the speed of the fastest molecule. Temperature can be related to velocity In Kinetic-Molecular theory so we can use the expression "the temperature of a molecule" The value of constants In the vander Waals equation depends on the gasExplanation / Answer
a)
Anion are shorter than their parent atoms because they have more charge .
This is false.
Reason:
cation are shorter than their parent atoms because they have more charge to remove electron. In the cation ramming electrons are tightly held by more protons thus the size of electron cloud in cation is shorter than the respective atom. For example we can see in the size of Na
Na = 1s2, 2s2 2p6, 3s1
Na+ = 1s2, 2s2 2p6
Here Na+ has only two shell while Na has three shell thus the size of Na+ is smaller than Na.
b)
the ionization energy is the energy required to create an anion.
This is false.
Reason:
The ionization energy (IE) is the energy which is required to remove the most loosely bound electron from the valence electron, of an isolated gaseous atom, as a result the atom form a cation not anion.
c) electron affinity is defined as the amount of energy released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion.
This is correct.
d) in general, electron affinity becomes more exothermic as we go from right to left across a period
This is false.
Reason:
Electron affinity decreases from right to left across the periods on the periodic table because the electrons are placed in a higher energy level far from the nucleus, thus it is easy to remove them.