Jaiden is writing a report about the structure of the atom. In her report, she says that the atom has three main parts and two subatomic particles. Do you agree with her? Why or why not?
Answers
particles, protons, neutrons, and electrons. Each one is smaller than an atom, therefore they are subatomic particles. An atom only requires protons and electrons to be an atom - e.g. Hydrogen has 1 proton and 1 electron. Neutrons do not effect the overall charge of the atom, and only increase the atomic mass.
AnsweSample Response: I disagree with her because an atom has two main parts: the nucleus and the electron cloud. Atoms have three subatomic particles: protons, neutrons, and electrons.
Explanation:
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(True or False) It would be most appropriate to use the noble gas core [He] when writing the shorthand electron configuration for sulfur.
Answers
Both Ethene and Propene have the same functional group (Alkenes)
Both Ethyne and Butyne have the same functional group (Alkynes)
Both Ethanol and Propanol have the same functional group (Alcohol)
Both Ethanoic Acid and Propanoic Acid have the same functional group (carboxylic acid)
2) malleability and thermal conductivity
3) density and specific heat capacity
4) hardness and boiling point
Answers
Chromatography is an important analytical technique used to separate individual components from a mixture using their polarity difference. Thus option 1 is correct.
What is chromatography ?
Chromatographic technique is used to separate components from a mixture using their polarity and solubility in a solvent. There are different kinds of chromatographic techniques such as paper chromatography, column chromatography, ion-exchange chromatography etc.
All the chromatographic techniques uses the common principle that is the differential distribution of components between mobile phase and stationary phase.
A mobile phase is the movable side in the chromatographic column which brings the solutes to the bottom of the column . Stationary column is stationary and thus the solutes which are more adoured to the stationary side will elute last.
The attachment of solutes to the mobile phase or stationary phase is dependant upon their polarity and solubility in the solvent used. Thus, option 1 is correct.
To find more about chromatography, refer the link below:
#SPJ2
Answer:
Option-1 (Solubility and Molecular polarity) is the correct answer.
Explanation:
Thin Layer Chromatography is employed to separate a mixture of non volatile compounds. In this technique an adsorbent material like silica gel is coated on a plastic, glass or aluminium sheet. Then the mixture of compounds is applied at the bottom of sheet and the sheet is placed in the container containing a solvent system. It is observed that the solvent starts travelling upward through capillary action.
While the solvent is running the mixture of compounds starts separating from each other. This separation is due to following physical properties.
1) Solubility of Mixture in Solvent:
In a mixture those compounds which has more solubility in solvent will travel more and will give greater Rf value and the less soluble will left behind with smaller Rf value. Hence due to solubility a mixture of compounds can be separated.
2) Polarity of Molecules:
As the stationary phase (adsorbent material) is polar in nature, so in mixture those compounds which are less polar will less interact with the stationary phase and will travel more with greater Rf value, while, more polar molecules will form stronger interactions with the stationary phase, hence will travel less and therefore, will show smaller Rf values.
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B: saturated
C: supersaturated
D: oversaturated
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Answer: The correct answer is Option D.
Explanation:
From the given options:
Option A: Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent.
Option B: Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.
Option C: Supersaturated solution is defined as the solution in which more amount of solute particles is present than the solvent particles.
Option D: Oversaturated is defined as the to saturate the solution excessively or to provide with more amount of substance for saturation.
Hence, the correct answer is Option D.
b. the number of electrons
c. period 3
d. the third sub level e. Li
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Answer: b. the number of electrons
Explanation:
1. 4 is the principal quantum number which describes the size of the orbital. It is represented by n.
2. The electrons are present in p sub shell also called as azimuthal quantum Number:This quantum number describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For p orbital, l=1.
3. The p subshell contains 3 electrons.