The nucleus of an atom is positively charged and the electrons are negatively charged therefore, the nucleus of an atom attracts the electrons around it and this nature is called nuclear charge.
Each electron in an atom experiences two kinds of force one is an attraction to the nucleus and another is repulsion from other electrons. The presence of many electrons makes more repulsive force and this decreases the nuclear attraction.
The amount of nuclear charge is the positive charge experienced by an electron that is present in a multi-electron atom. The attractive interaction between the nucleus of an atom and electrons of the same atom increases with the increase of positive charge (+Ze) on the nucleus.
This attraction for the valence electrons will be lower because of the Shielding of inner shell electrons. Due to the shielding of inner-shell electrons, the valence electrons will not experience the positive charge of the nucleus entirely while electrons close to the nucleus feel maximum attraction and have the lowest energy.
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(1) decreases (2) increases (3) remains the same
Answer: (2) increases
Explanation: Entropy is the measure of randomness or disorder of a system. More is the random arrangement of molecules in a system , more is the entropy of the system. More ordered is the arrangement of molecules in a system, less is the entropy of the system.
When carbon dioxide sublimes, it means solid carbon dioxide is directly changing to gaseous state without undergoing into liquid state, thus the molecules will be more random and thus the entropy will increase.
(2) C4H8 (4) C6H10
The homologous series to which C3H8 belongs are the alkanes hence it is in the same group as CH4.
The term homologous series refers to a family of molecules. The molecules in this family have the same functional group and differ from each other by -CH2-group.
The homologous series to which C3H8 belongs are the alkanes hence it is in the same group as CH4.
Learn more about homologous series:brainly.com/question/14953274
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(a) vacuole (c) chloroplast
(b) nucleus (d) cell membrane
Explanation:
The student most likely observed both (A) Vacuole and (C) Chloroplast that led him to the conclusion, that the cell is a plan cell.
Reason :
In a plant cell, Vacuole occupies 70% to 90% of the total volume of the cell, making it easier to identify.
Chloroplast contains photosynthetic pigment called chlorophyll (green in colour), which is only found in plant cell.
The presence of chloroplasts, containing green pigment chlorophyll for photosynthesis, in the cell likely led the student to conclude it was a plant cell.
The student likely made his conclusion based on observing the presence of chloroplasts in the cell. Chloroplasts contain a green pigment called chlorophyll, which enables plants to undergo photosynthesis and is not found in animal cells. The others listed (vacuoles, cell membrane, and nucleus) are also present in animal cells and therefore would not specifically indicate a plant cell.
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b. canola oil
c. peanut oil
d. sunflower oil
Answer:
Canola Oil
Explanation:
The data given is as;
Oil Melting Point / Freezing Point
Canola Oil 10 °C
Corn Oil -11 °C
Sunflower Oil -17 °C
Peanut Oil -2 °C
When the mixture of these oils is cooled to 5 °C only the Canola oil will solidify because it has a melting point of 10 °C and exists in solid state below 10 °C (Freezing Point). Therefore, it can easily be separated from remaining mixture which is present in liquid state.
B) KBr
C) CH3CH2OH
D) HCl
E) C6H6
How is this determined?
(2) are arranged in a regular geometric pattern
(3) have strong attractive forces between them
(4) have collisions that result in the system losing energy