Answer:
The maximum number of electrons present in a particular shell is calculated by the formula 2n2, where “n” represents the shell number. For instance, K shell is the first shell and it can hold up to 2(1)2 = 2 electrons. Similarly, L shell is the second shell and it can hold up to 2(2).
The dispersion force and the dipole force has been the attractive forces that result in the formation of bond within the molecules and result in the change in the properties of the compounds.
The dipole force is a strong force and results in a higher boiling point.
The statements regarding the forces are:
(a) For molecules with similar molecular weights, the dispersion forces become stronger as the molecules become more polarizable.
The statement is true.
(b) For the noble gases the dispersion forces decrease while the boiling points increase as you go down the column in the periodic table.
The statement is true.
(c) In terms of the total attractive forces for a given substance, dipole-dipole interactions, when present, are always greater than dispersion forces.
The statement is false.
(d) All other factors being the same, dispersion forces between linear molecules are greater than those between molecules whose shapes are nearly spherical.
The statement is true.
For more information about the dispersion force, refer to the link:
Answer:
A ,B- false
C,D- true
Explanation:
Dipole forces always lead to stronger attraction and boiling points than dispersion forces. When linear molecules are involved, they often posses greater dipole forces and higher boiling points. Linear alkanes posses higher boiling points than branched alkanes.
(2) hard-sphere model, electron-shell model, wave-mechanical model
(3) electron-shell model, wave-mechanical model, hard-sphere model
(4) electron-shell model, hard-sphere model, wave-mechanical model
Answer:2
Explanation:
HARD SPHERE MODEL
According to Dalton he viewed atoms as tiny, solid balls. His atomic theory had four statements which are:
1. Atoms are tiny, invisible particles.
2.Atoms of one element are all the same.
3.Atoms of different elements are different. 4.Compounds form by combining atoms.
ELECTRON SHELL MODEL
Bohr modified Rutherfords model of the atom by stating that electrons moves around the nucleus in orbit fixed sizes and energies.
WAVE MECHANICAL MODEL
Erwin states that electrons do not move in set path around the nucleus but in waves. He said it is impossible to know the exact point of an electron instead we have clouds of probability called the clouds.
gasoline
carbon
glucose
Answer: The correct answer is carbon.
Explanation:
Combustion reaction is defined as the reaction in which a hydrocarbon burns in oxygen or reacts with oxygen gas to produce carbon dioxide and water molecule.
Fossil fuels are defined as the hydrocarbons which mainly contains coal, fuel oil, natural gas etc..
When fossil fuels are burned in air, it mainly releases carbon dioxide, sulfur dioxide, methane, nitrous oxide etc..
The major component released during the combustion of fossil fuels is carbon.
Hence, the correct answer is carbon.
B.triglyceride
C.protein
D.Polypeptide
Answer
monosaccharide
Explanation