which element is the most electronegative out of the following K Mn Br WILL MARK BRAINLIEST!

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Answer 1

Answer: The correct answer is: [C]: "Br" {"bromine"} .
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When magnesium is ignited in air, the magnesium reacts with oxygen and nitrogen.The reaction between magnesium and nitrogen is represented by the unbalanced equation below.

Mg(s) + N2(g) --> Mg3N2(s)

51 Balance the equation in your answer booklet for the reaction between magnesium and nitrogen, using the smallest whole-number coefficients. [1]

52 In the ground state, which noble gas has atoms with the same electron configuration as a magnesium ion? [1]

53 Explain, in terms of electrons, why an atom of the metal in this reaction forms an ion that has a smaller radius than its atom. [1]

Answers

51)

Mg(s) + N₂(g) --> Mg₃N₂(s)

There is one Mg atom on the reactant side and three Mg atoms on the product side. So to balance the number of Mg on both side of the equation a coefficient 3 is placed before Mg on the reactant side. The number of N atoms are two on both side of the reaction. Therefore the balanced chemical equation is,

2Mg(s) + N₂(g) --> Mg₃N₂(s)

52)

The electron configuration of Mg is 1s²2s²2p⁶3s² or [Ne]3s²

The electron configuration of Mg²⁺ is 1s²2s²2p⁶ or [Ne]

The electron configuration of Ne is 1s²2s²2p⁶

Ne he same electron configuration as a Mg²⁺ ion.

53)

Mg has its valence electron in the 3s shell, but Mg²⁺ has no electron in the 3s shell, the valence electron in Mg²⁺is in the 2p orbital. The size of the 2 shell is smaller than the 3 shell. Hence, Mg²⁺ is smaller than Mg.

The balanced equation for the reaction between magnesium and nitrogen is 3Mg(s) + N2(g) -> Mg3N2(s). Neon has atoms with the same electron configuration as a magnesium ion. When an atom of a metal forms an ion, it loses electrons and has a smaller radius.

51. The balanced equation for the reaction between magnesium and nitrogen is:

3Mg(s) + N2(g) → Mg3N2(s)

52. The magnesium ion has the same electron configuration as a neon atom because both have the electron configuration of 2,8. Therefore, neon is the noble gas with atoms having the same electron configuration as a magnesium ion.

53. When an atom of a metal forms an ion, it loses one or more electrons to achieve a stable electron configuration. This results in a decrease in the size of the ion compared to the neutral atom. The loss of electrons reduces the repulsion between the remaining electrons, causing the ion to have a smaller radius.

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Is amber eye color considered brown?

Answers

Hello,

Amber eye color is not considered brown. The colors in the amber eye color are golden or copper.

Thanks for using brainly.

A charged particle made up of several non-metallic atoms joined together is a(n) Select one: a. covalent ion
b. polyatomic ion
c. multivalent ion
d. electron ion

Answers

Answer:

The correct answer is option b, that is, polyatomic ion.

Explanation:

A molecular ion also called polyatomic ion refers to a charged chemical species comprising two or more atoms bonded covalently with each other. The polyatomic ions comprise two or more non-metallic atoms. An example of a polyatomic ion is an ion of nitrate that comprises one atom of nitrogen and three atoms of oxygen. As the atoms in a polyatomic ion are bonded covalently, they are considered to possess a single charged unit.

It would be B. A polyatomic ion. Poly means many, while atomic refers to atoms more specifically the nature or category of these atoms is that they are non metallic ones, or basically nonmetal atoms. All of these nonmetallic atoms are joined together through covalent bonds and altogether they possess a unique charge. An example of a polyatomic ion would be sulphate or (SO4)^-3.

When the solids ba(oh)2 and nh4scn are mixed, a solution is produced and the temperature drops. ba(oh)2 (s) 2nh4scn(s) → ba(scn)2 (aq) 2nh3 (g) 2h2o(l) which statement about the energetics of this reaction is correct? a. the reaction is endothermic and h is negative. b. the reaction is endothermic and h is positive. c. the reaction is exothermic and h is negative. d. the reaction is exothermic and h is positive.

Answers

In the given chemical reaction:

Ba(OH)2 (s) + 2NH4SCN (s) → Ba(SCN)2 (aq) + 2NH3 (g) + 2H2O (l)

Since the temperature drops, it indicates that heat is being absorbed from the surroundings. This implies that the reaction is absorbing heat and is, therefore, an endothermic reaction.

Among the options provided, the correct statement about the energetics of this reaction is:

b. the reaction is endothermic and ∆H is positive.

Final answer:

The reaction between Ba(OH)2 and NH4SCN is endothermic and the enthalpy change (ΔH) is positive. This is because the reaction absorbs heat from the surrounding environment, causing the temperature to drop. The ΔH is positive in this type of endothermic reaction.

Explanation:

When solids Ba(OH)2 and NH4SCN are mixed, a solution is produced and the temperature drops. This indicates that the reaction is endothermic, which means it absorbs heat from the surroundings. As a result, the surroundings (or in this case the solution) will experience a decrease in temperature. According to the conventions used in chemistry, in an endothermic reaction, the enthalpy change (ΔH) is positive. Hence, the correct statement about the energetics of this particular reaction is: 'The reaction is endothermic and ΔH is positive.'

When considering the enthalpy change of a reaction, it's also key to understand that an exothermic reaction results when the bonds in the products are stronger than the bonds in the reactants - this is characterized by a negative ΔH (heat is released). In contrast, bonds in the products of an endothermic reaction are weaker than in the reactants, resulting in a positive ΔH (heat is absorbed).

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True or false: (a) For molecules with similar molecular weights, the dispersion forces become stronger as the molecules become more polarizable. (b) For the noble gases the dispersion forces decrease while the boiling points increase as you go down the column in the periodic table. (c) In terms of the total attractive forces for a given substance, dipole–dipole interactions, when present, are always greater than dispersion forces. (d) All other factors being the same, dispersion forces between linear molecules are greater than those between molecules whose shapes are nearly spherical.

Answers

The dispersion force and the dipole force has been the attractive forces that result in the formation of bond within the molecules and result in the change in the properties of the compounds.

The dipole force is a strong force and results in a higher boiling point.

The statements regarding the forces are:

(a) For molecules with similar molecular weights, the dispersion forces become stronger as the molecules become more polarizable.

The statement is true.

(b) For the noble gases the dispersion forces decrease while the boiling points increase as you go down the column in the periodic table.

The statement is true.

(c) In terms of the total attractive forces for a given substance, dipole-dipole interactions, when present, are always greater than dispersion forces.

The statement is false.

(d) All other factors being the same, dispersion forces between linear molecules are greater than those between molecules whose shapes are nearly spherical.

The statement is true.

For more information about the dispersion force, refer to the link:

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Answer:

A ,B- false

C,D- true

Explanation:

Dipole forces always lead to stronger attraction and boiling points than dispersion forces. When linear molecules are involved, they often posses greater dipole forces and higher boiling points. Linear alkanes posses higher boiling points than branched alkanes.

A sample of 0.3257 g of an ionic compound containing the bromide ion (Br−) is dissolved in water and treated with an excess of AgNO3. If the mass of the AgBr precipitate that forms is 0.7165 g, what is the percent by mass of Br in the original compound?