29Nitrogen and phoshorus react with oxygen to form compounds. When these compoun

Question

29Nitrogen and phoshorus react with oxygen to form compounds. When these compounds react with water, what most likely result?

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30.the alkali metal oxides are classified as ionic because

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31What ion(s) is/are not isoelectronic with a neon atom?

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32What ion(s) is/are not isoelectronic with an argon atom?

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33What is the periodic trend for atomic radii?

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34What is the periodic trend for effective nuclear charge?

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35What is the periodic trend for first ionization energy?

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36What is the periodic trend for metallic character?

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37What is/are the product(s) when an alkali metal hydride reacts with water?

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38Which element exhibits the least metallic character?

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39Which type of ions will have the largest ionic radius when the number of electrons is the same?

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40Which type of ions will have the smallest ionic radius when the number of electrons is the same?

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A. an acidic solution B. a basic solution C. a neutral solution D. a solution which is both acidic and basic

Explanation / Answer

29) Answer: (A)

Explanation:

V A group of Nitrogen and VIA group of Phosphorous are reacting with Oxygen produces the Acidic Oxides. When these are dissolving in water produces the Acid solutions.

30) Answer: (C)

31) Answer: (A,C andF)

Explanation:

These are Iso electronic with Ar.

32) Answer: (A,E and F)

Explanation:

F- and Mg2+ are Isoelectronic with Ne. The Br- is Isoelectronic with Kr.

33) Answer: (C)

Explanation:

In the period from left to right the electron enters in to the same outer shell as a result of this the atraction of the nucleous increases on the electrons. Hence the atomic radii decreases.

In the group from top to bottom the electrons enters in to the different shells means the number of the shells increases. The atraction of the nucleous decreases when the number of shells increasing and the atomic radii increases.

34) Answer: (A)

same atomic radii explanation.

35) Answer: (B)

Explanation: It depends on the nucleous attraction of the outer most shell electrons.

36) Answer: (C)

Explanation:

Metalic character means ability of donating nature of electrons or leaving the valency shell electrons and will get the stable noble gas electron configuration.

Generally in the groups from top to bottom the electron leaving ability (Metalic character) increases due to the decreasing the attraction of the nucleous on the outer shell electrons.

37) Answer: (B)

38) Answer: (A)

Explanation:

Atomic radii is less and the attraction of the nucleous on the outer shell electrons is more.

39) Answer: (A)

Explanation: Atomic radii more for the anions.

40) Answer: (A)

Explanation: For the cations nucleous attraction is more on the outer most shell electrons.

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