Answer:
True
Explanation:
Answer:
answer is true
Answer:
Explanation:
A) Number of pi bonds and if they are delocalized:
Determine the number of pi (π) bonds in the molecule. Pi bonds are formed by the overlap of p-orbitals in a double or triple bond.
Assess whether these pi bonds are delocalized. Delocalization occurs when electrons in pi bonds are not localized between just two atoms but are spread out over multiple atoms or regions within the molecule. This typically involves resonance structures in organic chemistry.
B) Number of sigma bonds and if they are localized:
Determine the number of sigma (σ) bonds in the molecule. Sigma bonds are formed by the head-on overlap of atomic orbitals in single bonds.
Assess whether these sigma bonds are localized. In most cases, sigma bonds are localized between two specific atoms, meaning they involve a direct bond between those atoms.
C) Number of hydrogen bonds and if they are polarized:
Determine the number of hydrogen bonds in the molecule. Hydrogen bonds are a special type of dipole-dipole interaction involving hydrogen atoms bonded to highly electronegative atoms (such as oxygen, nitrogen, or fluorine) and other electronegative atoms.
Assess whether these hydrogen bonds are polarized. Hydrogen bonds involve a difference in electronegativity between the hydrogen atom and the electronegative atom, creating a polar bond. The extent of polarization can vary depending on the specific atoms involved.
D) Number of covalent bonds and if they are ionic:
Determine the number of covalent bonds in the molecule. Covalent bonds involve the sharing of electrons between atoms.
Assess whether these covalent bonds are ionic. Covalent bonds are typically characterized by the sharing of electrons, while ionic bonds involve the complete transfer of electrons from one atom to another, resulting in ions. Covalent bonds are typically nonpolar or polar, while ionic bonds are highly polar.
Answer:
Explanation:
That is a chemical property of alkali metals: they are highly reactive and react vigorously with water to produce the correspondant hydroxide and hydrogen gas.
These are some of those reactions:
The alkali metals are the elements of group 1 of the periodic table: Li, Na, K, Rb, Cs, and Fr. They have one valence electron which may lose easily to form an ion with charge +1.
Alkali metals react with water to produce hydrogen gas and a basic solution of the metal hydroxide (for instance, sodium hydroxide when lithium is in the reaction). This reaction signifies the easier oxidation of alkali metals compared to hydrogen.
When alkali metals react with water, they form hydrogen gas and a basic solution of the metal hydroxide. This vigorous reaction reveals that alkali metals are easier to oxidize than is hydrogen. For instance, considering the reaction of lithium with water:
2Li(s) + 2H₂O(l) --> 2NaOH(aq) + H₂(g)
The solid state (s) lithium reacts with liquid water to generate hydrogen gas and the ionic compound sodium hydroxide. This sodium hydroxide, which is a solid in its pure form, promptly dissolves in water.
The same kind of reaction occurs with other alkali metals and also some alkaline earth metals, although beryllium and magnesium are exceptions.
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B. small land-based organisms
C. compressed rock and sediment
D. decomposing inorganic matter
Answer: Blocks harmful UV rays transports and distributes heat cycles essential elements: C, O, and N
Explanation:
The atmosphere is the integral part of the earth this typically includes gases which are necessary for sustaining lives on earth. The earth atmosphere forms a protective blanket around the inner earth which prevents the entry of majority of UV rays directly coming from the sun, This way atmosphere plays an important role in protecting the living beings from carcinogenic UV rays. It distributes the heat coming from the sunlight also it reflect back the absorb heat energy to the space acquired from the sun so as to maintain the balance of heat on planet earth.
It essentially plays an important role in circulation of essential gaseous elements like carbon, oxygen and nitrogen as these are required by the plants to conduct photosynthesis, respiration and protein synthesis respectively. Majorly all other life forms on earth are dependent on plants for food requirements therefore this cycling is beneficial for sustaining their lives too.
b. silver
c. oxygen
d. copper
35
65
95
Answer : The correct option is, 30 protons
Explanation :
Element = Zinc
Atomic number = 30
Atomic mass number = 65
As we know that the atomic number is equal to the number of electrons and number of protons.
Atomic number = Number of electrons = Number of protons = 30
Number of neutrons = Atomic mass - Number of protons = 65 - 30 = 35
Therefore, the number of protons an uncharged zinc atom have 30 protons.
Answer:
30 protons
Explanation:
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