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Quiz for Chapter 1, textbook for Chemistry FSc Part 2

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Period 3 Elements: Atomic and Physical Properties

Question 1 of 10

1

Which of the two elements Mg and Al has a more stable structure?

Select one of the following:

  • Mg

  • Al

  • Both have stable structure

Explanation

Question 2 of 10

1

As we go from left to right in a period, the atomic radius

Select one of the following:

  • Increases

  • Decreases

  • Does not change

Explanation

Question 3 of 10

1

According to the Pauling scale, the most electronegative element is

Select one of the following:

  • Francium

  • Cesium

  • Fluorine

Explanation

Question 4 of 10

1

Electronegativity is defined as

Select one of the following:

  • A measure of the charge on the electrons surrounding the nucleus in an atom.

  • A measure of the tendency of an atom to attract a bonding pair of electrons.

  • A measure of the tendency of an atom to attract an electron towards itself.

Explanation

Question 5 of 10

1

In going from left to right in a period, the electronegativity values

Select one of the following:

  • Decrease

  • Increase

  • Increase and then decrease

Explanation

Question 6 of 10

1

The electronegativity value of Argon is

Select one of the following:

  • 0.7

  • 3

  • No value

Explanation

Question 7 of 10

1

The structures of elements, as you go from left to right in a period, change as follows

Select one of the following:

  • Na, Mg and Al have metallic structures.
    Si has giant covalent structure.
    P, S, Cl, Ar are simple molecules.

  • Na, Mg and Al are simple molecules.
    Si has metallic structure.
    P, S, Cl, Ar have a covalent structure.

  • All elements have same structure.

Explanation

Question 8 of 10

1

The electrical conductivity in period 3, as you move from left to right in the period

Select one of the following:

  • Increases

  • Decreases

  • Remains constant

Explanation

Question 9 of 10

1

The forces of attraction between the molecules of Phosphorous, Sulphur, Chlorine and Argon are

Select one of the following:

  • Van der Waal attractions

  • Ionic bonds

  • Covalent bonds

Explanation

Question 10 of 10

1

The melting and boiling points of Phosphorous, Sulphur, Chlorine and Argon as compared to ones of previous elements in the period are

Select one of the following:

  • Lower

  • Higher

  • Equal

Explanation

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