CHEMISTRY HIGH SCHOOL

Which pair of atoms has the most polar bond?(1) H−Br
(2) H−Cl
(3) I−Br
(4) I−Cl

Answers

Answer 1
Answer: For the question given above, option 2 which is H-Cl pair of atoms has the most polar bond among the four of them. 

The larger the value of the electronegativity, the greater the atom’s strength to attract a bonding pair of electrons. Hydrogen has an electronegativity of 2.1, and chlorine has an electronegativity of 3.0. The electron pair that is bonding HCl together shifts toward the chlorine atom because it has a larger electronegativity value.
Answer 2
Answer:

Among the presented bonds, the most polar is H-Cl.

What is polarity?

Polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment.

The higher the difference in electronegativity, the more polar the bond.

We will calculate the difference in electronegativity for each bond.

  • (1) H−Br

ΔEN = |EN(H)-EN(Br)| = |2.2-3.0| = 0.8

  • (2) H−Cl

ΔEN = |EN(H)-EN(Cl)| = |2.2-3.2| = 1.0

  • (3) I−Br

ΔEN = |EN(I)-EN(Br)| = |2.7-3.0| = 0.3

  • (4) I−Cl

ΔEN = |EN(I)-EN(Cl)| = |2.7-3.2| = 0.5

Among the presented bonds, the most polar is H-Cl.

Learn more about polarity here: brainly.com/question/8857494

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7 Which element has atoms that can form halide ions?(1) iodine (3) strontium
(2) silver (4) xenon

Answers

The element that has atoms that can form halide ions is iodine.

What are halogens?

Halogens are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid and Iodine and astatine are solids. Halogens are very reactive, the reactivity decreases from fluorine to astatine. Halogens do not exist in elemental form in nature. Astatine isotopes are radioactive with short half-lives.

One of the definitive properties of halogens is that they are highly reactive. Due to this nature, they can form different compounds such as halides, interhalogens and polyhalogenated compounds. We will look at them in brief below.

These are compounds formed by the reaction of halogens with metals. Metal halides can be highly ionic compounds, monomeric covalent compounds or polymeric covalentcompounds.

Therefore, The element that has atoms that can form halide ions is iodine.

Learn more about halogens, here:

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It is iodine. The halogen creates halide ions and takes in electrons.

What is an isotope? a. A form of an element with a different number of electrons c. A form of an atom with a different amount of orbitals b. A form of an atom with a different number of protons d. A form of an atom with a different number of neutrons

Answers

An isotope is an element with different atomic mass.

We have,
Atomic mass = no. of protons + no. of neutrons 
Now, we know, protons never change.....so the only thing that changes is neutrons if we want different atomic mass.

Soooooooo,

The answer is "D. A form of an atom with a different number of neutrons"

The answer is not A. because same element with different number of electron is ion.

The answer is not B. because if it has different number of proton....it is going to be a different element. Just like our fingerprints, we can say that protons are fingerprints of element. No. of protons never change.

The answer is not C. because again talking about electrons.

Answer:

D. A form of an atom with a different number of neutrons.

Explanation:

An Isotope has an equal number of protons but different numbers of neutrons in their nuclei.

Hope it helped!

What is the total amount of heat required to vaporize 1.00 gram of H2O(g) at 100.0C and 1 atmosphere?(1) 4.18 J(2) 334 J(3) 373 J(4) 2260 J

Answers

for this you will need the latent heat capacity for the vaporization of water. 

Chemical reactions can be detected by the formation of a gas.
a. True
b. False

Answers

A) True , production of a gas (new substance) during the reaction of two isotopes indicate a chemical reaction

Enter the molecular formula for butane, C4H10.
Express your answer as a chemical formula.

Answers

Butane is from the family of alkanes with –ane as its family name. The but- prefix stands for having four carbon atoms. The C4H10 is the general formula of butane and can also represent other forms or structures of butane. However if the question asks for the molecular formula of butane, think of how many electrons it can share to the hydrogen atom. The carbon atom can share 4 and hydrogen 1.  So if the three hydrogen atoms are attached to the first carbon, the other shared electron is attached to the second carbon. The second carbon atom can accommodate two hydrogen and 1 carbon. The third carbon can accommodate 2 hydrogen atoms and 1 carbon and the fourth carbon can accommodate 3 hydrogen atoms. The molecular formula is CH3-CH2-CH2-CH3.

How many centimeters would be one - half of a meter beA. 100
B. 500
C. 50
D. 5

Answers

~Hello There!~

Considering that there are 100 cm in a meter, half of that would be 50.

Your answer is C. 50.

Hope This Helps You!

Good Luck :)

Have A Great Day ^_^

- Hannah ❤
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