Which molecule contains a triple covalent
bond?
(1) H2 (3) O2
(2) N2 (4) Cl2
Answers
Answer: The correct answer is Option 2.
Explanation:
Covalent bond is defined as the b which is formed by the sharing of electrons between the atoms forming a bond.
Non-polar covalent bond is defined as the bond which is formed when there is no difference in electronegativity between the atoms. When atoms of the same element combine, it results in the formation of non-polar covalent bond. For Example: etc..
For the given options:
- Option 1:
Hydrogen is the 1st element of the periodic table having electronic configuration
This element needs 1 electron to attain stable electronic configuration and will form single covalent bond with another hydrogen atom.
- Option 2:
Nitrogen is the 7th element of the periodic table having electronic configuration
This element needs 3 electrons to attain stable electronic configuration and will form triple covalent bond with another nitrogen atom.
- Option 3:
Oxygen is the 8th element of the periodic table having electronic configuration
This element needs 2 electrons to attain stable electronic configuration and will form double covalent bond with another oxygen atom.
- Option 4:
Chlorine is the 17th element of the periodic table having electronic configuration
This element needs 1 electron to attain stable electronic configuration and will form single covalent bond with another chlorine atom.
Hence, the correct answer is Option 2.
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The pH level of tomato juice is 4.2. What is the hydrogen-ion concentration [H+] for tomato juice?A. 0.0004 B. 0.0006 C. 0.00004 D. 0.00006
Answers
Answers
Answer:
Yes.
Molecules always move in most objects, but in solids, they are extremely slow. Liquids move slower than gases, but move more than solids.
Final answer:
Molecules do move in a liquid, as they are free to slide past each other and change neighbors due to their mutual attraction. This allows liquids to flow and take the shape of their containers. The speed of this movement can depend on the mass of the molecules - lighter ones move and diffuse faster.
Explanation:
Yes, indeed, molecules do move in a liquid. This is due to the fact that liquids are typically in a more energetic state in which their particles can slide past one another and change neighbors. However, these particles remain closely held together by their mutual attraction which maintains the liquid's lack of shape conformity.
In liquids, unlike solids, the atoms or molecules are free to move around, which contributes to them being classified as a type of fluid. Due to their capacity to flow and rearrange their molecular structure, liquids deform easily when under stress. Once the force is removed, they don't return to their initial form, which is evidenced when a liquid takes the shape of a container it's put in.
Finally, the movement of these molecules is also somewhat dependent on their mass. Heavier molecules tend to move slower and are therefore slower to diffuse. In contrast, lighter molecules tend to move and diffuse faster.
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b) the number of electrons in the outermost electron shell.
c) the attraction of an atom for the electrons in a covalent bond.
d) the repulsion of electrons in one atom for electrons in another atom.
Answers
Answer:
c) the attraction of an atom for the electrons in a covalent bond.
Explanation:
Electronegativity, symbol χ, is a chemical property describing an atom's ability of to attract a shared pair of electrons to itself. It is influenced by the atomic number of the atom and the distance between the valence electrons and the charged nucleus. As the electronegativity number of atoms increases, the more the atom attracts electrons towards itself.
Final answer:
Electronegativity is the attraction of an atom for electrons in a covalent bond. It determines how strongly an atom pulls shared electrons towards itself in a molecule.
option c is correct
Explanation:
Electronegativity is the attraction of an atom for the electrons in a covalent bond. It is a measure of how strongly an atom pulls shared electrons towards itself when it forms a covalent bond with another atom.
For example, in a molecule of HCl, chlorine is more electronegative than hydrogen, so the chlorine atom pulls the shared electron pair towards itself, resulting in a partial negative charge on the chlorine atom and a partial positive charge on the hydrogen atom.
Electronegativity increases as you move across a row or period in the periodic table from left to right and decreases as you move down a column or group.
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Answers
When making a guess, you are forming a hypothesis.
A hypothesis is a statement you make based on your observations of a certain phenomenon, so it's an educated guess.
You will then carry out an experiment whose results will hopefully support your hypothesis.
Explanation:
Hypothesis is a supposition or projected clarification created on the premise of restricted proof as a place to begin for more investigation.A hypothesis may be a tentative, testable answer to a scientific question. Once a person encompasses a scientific question she is fascinated by, the person reads up to search out out what's already far-famed on the subject. Then she uses that data to make a tentative answer to her scientific question. Typically folks discuss with the tentative answer as "an educated guess."
Answers
Object A at 40 degrees C and object B at 80 degrees C are placed in contact with each other. The heat flow will flow from the Object B to the object A because of temperature difference. To attain equilibrium, the heat flow must flow form a higher temperature to a lower temperature.