On the basis of electronegativity, which pair of elements is most likely to form monatomic ions? responses a. Ba and O b. Cs and Rb c. O and F d. Na and K

Answers

Answer 1

Answer: On the basis of electronegativity, elements that are far apart on the periodic table are more likely to form monatomic ions. This is because the larger the electronegativity difference between two elements, the more likely it is for one element to gain or lose electrons to achieve a stable electron configuration.

Out of the given options, the pair of elements that are the farthest apart on the periodic table is option d. Na (sodium) and K (potassium). Both sodium and potassium are in Group 1 (alkali metals), but potassium is located one period below sodium, making it more likely to form a monatomic ion due to the larger electronegativity difference.

Therefore, the answer is d. Na and K.

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Calculate the number of moles of bromobenzene, magnesium, and benzophenone that you will use in this experiment. You will need to look up the molecular weights of each substance and the density of bro. A) Bromobenzene B) Magnesium C) Benzophenone D) None of the above
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Which of the following is true about bases?a. They help to build up cells.
b. They release hydroxide ions in solution.
c. They tend to decrease the pH of a solution.
d. They have a sharp or sour taste. explain

Answers

B, the release hydroxide ions in solution

What happens when Ca(NO3)2 and Na2CO3 combine?

Answers

When the two compounds are allowed to be in contact and reacts the product would be sodium nitrate (NaNO3) and calcium carbonate (CaCO3). This reaction is a double displacement reaction. The balanced equation is :

Ca(NO3)2 + Na2CO3 = 2NaNO3 + CaCO3

Matter is classified as a(1) substance, only
(2) substance or as a mixture of substances
(3) homogenous mixture, only
(4) homogenous mixture or as a heterogeneous mixture

Answers

I think the best option is the second option. Matter is classified as a substance or as a mixture of substances. It is a physical substance that occupies space and has mass. Technically, everything we from our eyes is considered as matter.

ZnS has two common polymorphs: Sphalerite and Wurtzite. Based on the analysis of Medelung constants alone, predict which polymorph should be more stable. Assume that the Zn-S distances in the two polymorphs are identical.

Answers

Answer:

Wurzite has a higher Madelung constant when compared with Sphalerite therefore Wurizite is more stable.

Explanation:

Zinc Sulphide is a chemical compound that exhibits polymorphism. This means Zinc Sulphide can exists in different forms as a compound. Zinc Sulphide has two common polymorphs named; Wurtzite and Sphalerite .

This two polymorphs are crystalline in structure. Wurtzite is hexagonal in shape while Sphalerite is cubic in shape.

Madelung constant was named after German Physicist Erwin Madelung. Madelung constant is dependent on the the way ions are arranged in a solid substance or molecule. It is used to calculate the amount of energy required to move an ion from one point to the another in a crystal substance.

Madelung constant for Wurtzite is 1.64132 and for Sphalerite is 1.63806. Due to the fact that Wurtzite has a slightly higher Madelung constant that Sphalerite, it tends to be more stable than Sphalerite.

a gas has a volume of 590 mL at a temperature of 590 mL at a temperature of -55.0 degrees Celsius. What volume will the gas occupy at 30.0 degrees Celsius?

Answers

Answer: The volume that gas occupy will be 820.04mL.

Explanation:

To calculate the volume of the gas at different temperature, we will use the equation given by Charles' Law.

This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

$V\propto T$

or,

$(V_1)/(T_1)=(V_2)/(T_2)$

where,

$V_1\text{ and }T_1$ are the initial volume and initial temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and final temperature of the gas.

We are given:

$T(K)=273+T(^oC)$

$V_1=590mL\nT_1=-55^oC=218K\nV_2=?mL\nT_2=30^oC=303K$

Putting values in above equation:

$(590)/(218)=(V_2)/(303)\n\nV_2=820.04mL$

Hence, the volume that gas occupy will be 820.04mL.

How many pairs of non-bonding electrons are in a silicon disulfide molecule?

Answers

Silicon disulfide (SiS2) is a covalent compound consisting of silicon (Si) and sulfur (S) atoms. To determine the number of pairs of non-bonding electrons in a silicon disulfide molecule, we can first calculate the total number of valence electrons in the molecule.

Silicon (Si) has 4 valence electrons, and sulfur (S) has 6 valence electrons each. Since there are two sulfur atoms in SiS2, that's a total of 2 x 6 = 12 valence electrons from sulfur.

Now, add the valence electrons from silicon and sulfur:

4 (Si) + 12 (S) = 16 valence electrons in total.

In a covalent compound like silicon disulfide, all the valence electrons are involved in bonding, either in forming bonds (shared electrons) or as non-bonding pairs.

Since SiS2 forms two covalent bonds (Si-S-Si), each involving two electrons, there are 4 electrons used for bonding (2 pairs of bonding electrons). Therefore, the remaining 16 - 4 = 12 electrons are non-bonding pairs.

So, there are 12 pairs of non-bonding electrons in a silicon disulfide (SiS2) molecule.

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The net energy released or absorbed during a reversible chemical reaction is equal to(1) the activation energy of the endothermic reaction (2) the activation energy of the exothermic reaction (3) the difference between the potential energy of the products and the potential energy of the reactants (4) the sum of the potential energy of the products and the potential energy of the reactants

"For a many-electron atom, which of the following sublevels has the highest energy? A. 3p. B. 3d. C. 3s. D. 4s".

An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. Which element is element X?