18. Nitrogen has a greater first ionization energy than phosphorus. What is the best evidence to supportthis observation?(A) Nitrogen has a greater effective nuclear charge.(B) A nitrogen atom is larger than a phosphorus atom.(C) The electron ionized from nitrogen is in a lower energy level closer to the nucleus.(D) The electron ionized from nitrogen is not from a valence energy level.19. Caustic soda is 20 M NAOH and is diluted for household use. What is the household concentration if 10mL of the concentrated solution is diluted to 500 mL?(A) 0.4 M NaOH(В) 400 M NaОН(C) 4 M NaOH(D) 20 M NaOH20. A sample of 0.0255 mol potassium hydroxide (KOH) was dissolved in water to prepare 10.0 ml ofsolution. What is the molarity of the solution?(A) 0.4 M(В) 2.55 М(С) 0.25 М(D) 4 M

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18. Nitrogen has a greater first ionization energy than phosphorus. What is the best evidence to support this observation? (A) Nitrogen has a greater effective nuclear charge. (B) A nitrogen atom is larger than a phosphorus atom. (C) The electron ionized from nitrogen is in a lower energy level closer to the nucleus. (D) The electron ionized from nitrogen is not from a valence energy level.

18. Nitrogen has a greater first ionization energy than phosphorus. What is the best evidence to support this observation? (A) Nitrogen has a greater effective nuclear charge. (B) A nitrogen atom is larger than a phosphorus atom. (C) The electron ionized from nitrogen is in a lower energy level closer to the nucleus. (D) The electron ionized from nitrogen is not from a valence energy level.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

18. Nitrogen has a greater first ionization energy than phosphorus. What is the best evidence to support
this observation?
(A) Nitrogen has a greater effective nuclear charge.
(B) A nitrogen atom is larger than a phosphorus atom.
(C) The electron ionized from nitrogen is in a lower energy level closer to the nucleus.
(D) The electron ionized from nitrogen is not from a valence energy level.
19. Caustic soda is 20 M NAOH and is diluted for household use. What is the household concentration if 10
mL of the concentrated solution is diluted to 500 mL?
(A) 0.4 M NaOH
(В) 400 M NaОН
(C) 4 M NaOH
(D) 20 M NaOH
20. A sample of 0.0255 mol potassium hydroxide (KOH) was dissolved in water to prepare 10.0 ml of
solution. What is the molarity of the solution?
(A) 0.4 M
(В) 2.55 М
(С) 0.25 М
(D) 4 M

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