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Use the periodic table to answer the fol...

Use the periodic table to answer the following questions.
a. Identify an element with five electrons in the outer subshell.
b. Identify an element that would tend to lose two electrons.
c. Identify an element that would tend to gain two electrons.
d. Identify the group having metal, non-metal, liquid as well as gas at the room temperature.

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(a) Chromium `(Z = 24).` It has five electrons in the outer 3d subshell.
(b) Magnesium `(Z =12)` can lose two electrons readily.
(c ) Oxygen `(Z=8)` can gain two electrons.
(d) Halogens (group 17). It has metal (iodine), non-metals (F, Cl, Br), liquid bromine and gases.
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Use of Modern periodic table to answer the following questions: (i) Identify an element with six electrons in the outermost shell. (ii) Identify an element that would tend to lose one electron. (ii) Identify an element that would tend to gain three electrons. (iv) Identify the group having metal, non-metal, liquid as well as gas at 30^(@)C temperature.

Explain the following question (based on size of atoms or ions and other periodic properties): a. Arrange the following species in decreasing order of their sizes//ionic radii. i. Ar, K^(o+),Cl^(ɵ),S^(2-) and Ca^(2+) ii. Al^(3+), Mg^(2+),Na^(o+),Cl^(ɵ), N^(3-) and O^(2-) b. What are isoelectronic species? Name the species which are isoelectronic with each of the following atom or ions. i. Rb^(o+) ii. F^(ɵ) , iii. Mg^(2+) iv. Ar c. Arrange the following species // atoms in decreasing order of reducing character. i. Na, Mg and Al ii. Mg, Ca and Sr iii. Na, K and Rb iv. F^(ɵ), Cl^(ɵ),Br^(ɵ) and I^(ɵ) d. The decreasing order of reactivety of group 1 elements is Cs gt Rb gt K gt Na gt Li whereas that of group 17 elements is (Cl gt F gt Br gt I) . Explain. e. Predict the formula of the stable binary compounds that would be formed by the combination of the following pairs of elements: i. Mg and N ii. Si and O iii. Elements with Z=71 and F iv. P and F v. Al and I vi. Li and O f. Ansewer the following by the use of periodic table. i. Identify the element that would tend to gain two electrons. ii. Identify the group having metal, non-metal, liquid as well as gas at the room temperature, iii. Identify the element with five electrons in the outer shell. iv. Identify the element that would tend to lose two elctrons.

Element "X" has two electrons in its "M" shell.Identify the element.

Read the following statements and identify the elements : A lustrous non-metal which has 7 electrons in its outermost shell.

Identify, the elements with the following property The metal which exists in liquid state at room temperature.

MODERN PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -NCERT FILE (NCERT TEXTBOOK EXERCISE)
  1. Would you expect the second electron gain enthalpy of O as positive, m...

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  2. What is the basic difference between the terms electron gain enthalpy ...

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  3. How would you react to the statement that the electronegativity of N o...

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  4. Describe the theory associated with the radius of an atom as it a. g...

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  5. Would you expect the first ionisation enthalpies for two isotopes of t...

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  6. What are the major differences between metals and non-metals?

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  7. Use the periodic table to answer the following questions. a. Identif...

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  8. The increasing order of reactivity among group 1 elements is LiltNaltK...

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  9. Write the general outer electronic configuration of s-,p-,d- and f-blo...

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  10. Assign the position of the element having outer electronic configurati...

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  11. Identify the position of the elements having outer electronic config...

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  12. Predict the formula of the stable binary compounds that would be forme...

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  13. In the modern periodic table, the period indicates the value of

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  14. Which of the following statements related to the modern periodic table...

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  15. Anything that influences the valence electrons will affect the chemist...

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  16. The size of isoelectronic species F^(ɵ), Ne, and Na^(o+) is affected b...

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  17. Which one of the following statement is incorrect

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  18. Considering the elements B, Al, Mg and K, the correct order of their m...

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  19. Considering the elements B, C, N, F and Si, the correct order of their...

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  20. Considering the elements F,Cl, O and N, the correct order of their che...

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