In general, atomic radii   A. decrease down a group and remain constant across a period. B. decrease down a group and increase across a period. C. increase down a group and increase across a period. D. increase down a group and decrease across a period.

Q: 48. What kind of reaction is this: Mg(s) + 2HI(aq) forms Mg12(s) + H2(g) A) single replacement B)…

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Q: Chapter 4, Question 88 One hydrogen emission line has a wavelength of 486 nm. Identify nfinal and…

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A: Valence electrons means electron present in outermost orbital. Thus,

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Q: s) +2C1,(g) – SnCI,0) AHin = -511.3 kJ/mol -2.45 Incorrect (g) + C,(g) → 2 HCI(g) AHin = -184.6…

A: As we know, for a chemical reaction,  □H = □E + □ngRT/1000 Where ,  □ng = change in gaseous moles R…

Q: Chapter 4, Question 88 One hydrogen emission line has a wavelength of 486 nm. Identify ninal and…

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Q: Numbers 7,8 and 9 only thank you

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A: An oxidising agent is a substance that oxidizes others but itself undergoes reduction.

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Q: Which one is larger?  K or  K+

A: K is the symbol of potassium  Atomic no. of K = 19

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Q: A DIAGNOSTIC TEST 39 59. Which data must be collected to calculate the enthalpy of reaction? (A)…

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Q: a) State the number of energy levels for I. b) State the number of energy levels for Br.

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Q: Determine the number of core and valence electrons present in iodine. Number of Core Electrons:…

A: Here, we have to find the number of core and valence electrons that are present in iodine.

Q: 1. Which does not belong to the group?* Hg₂ + 2Cl⁻¹ ⇌ HgCl₂ Ag⁺¹ + Cl⁻¹ ⇌ AgCl₂ Pb⁺² + 2Cl⁻¹ ⇌ PbCl₂…

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Q: Chapter 4, Problem 4.24EP Textbook Problem Give the chemical symbol for each of the following ions.…

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Q: Which does not belong to the group and why? Hg₂ + 2Cl⁻¹ ⇌ HgCl₂ Ag⁺¹ + Cl⁻¹ ⇌ AgCl₂ Pb⁺² + 2Cl⁻¹ ⇌…

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Q: When a phosphorus atom is converted to a phosphide ion. what happens to the number of unpaired…

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Q: What is the trend observed what is the trend observed for ions energy going down a group? Explain…

A: What is the trend observed for ions energy going down a group?