Advertisements
Advertisements
प्रश्न
Parts (i) to (v) refer to changes in the properties of elements on moving from left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d).
(i) The non metallic character of the elements:
(a) Decreases
(b) Increases
(c) Remains the same
(d) Depends on the period
(ii) The electro negativity
(a) Depends on the number of valence electrons
(b) Remains the same
(c) Decreases
(d) Increases
(iii) The ionization potential
(a) Goes up and down
(b) Decreases
(c) Increases
(d) Remains the same
(iv) The atomic size
(a) Decreases
(b) Increases
(c) Remains the same
(d) Sometimes increases and sometimes decreases
(v) The electron affinity of the elements in groups 1 to 7:
(a) Goes up and down
(b) Decreases and then increases
(c) Increases
(d) decreases
उत्तर
(i) b
(ii) d
(iii) c
(iv) a
(v) c
APPEARS IN
संबंधित प्रश्न
How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table?
How does the number of valence electrons vary on moving from left or right in the second period of the periodic table?
In which part of a group would you separately expect the elements to have the largest atomic size?
Explain why, the properties of elements are repeated after 2, 8, 18 and 32 elements in the periodic table.
What do you understand by orbits?
An element X belong to 3rd periods and group II of the periodic table state:
the number of valence electrons,
What is meant by periodicity of elements?
The following table represents the first period of the modern periodic table. Study the table and answer the questions that follow:
(i) Write the formula of the sulphate of the element with atomic number 13.
(ii) What type of bonding will be present in the oxide of the element with atomic number 1?
(iii) Which feature of the atomic structure accounts for the similarities in the chemical properties of the elements in group VIIA of the periodic table?
(iv) Name the element which has the highest ionization potential.
(v) How many electrons are present in the valence shell of the element with atomic number 18?
(vi) What is the name given to the energy released, when an atom in its isolated gaseous state accepts an electron to form an anion?
(vii) What is the electronic configuration of the element in the third period which gains one electron to become an anion?
(viii) Fill in the blanks:
The atomic size ______ as we move from left to right across the period, because the ______ increases, but the ______ remains the same.
Select the correct answer from the options given below.
Is the group number of the element whose atomic number is 4.
