Periodic Table Archives - Page 12 Of 15

The most electronegative element from the following elements is :
(a) Magnesium
(b) Chlorine
(c) Aluminium
(d) Sulphur

Chlorine Reason Chlorine is the most electronegative element among the given options because electronegativity increases left to right in a period.

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the brackets to complete the following statements:
(i) The element B would have (lower/higher) metallic character than A.
(ii) The element A would probably have (lesser/higher) electron affinity than B.
(iii) The element A would have (greater/smaller) atomic size than B.

If the element are placed as B and then A in the 3rd period of the periodic table then (i) The element B would have higher metallic character than A as metallic…

Give reasons :
(i) Inert gases do not form ions.
(ii) Ionization potential increases across a period — left to right.

(i) Inert gases have completely filled octet which makes them extremely stable. They neither lose, nor gain electrons. Hence, they do not form ions. (ii) The ionization potential of an…

Give one word or a phrase for the following statement: The energy released when an electron is added to a neutral gaseous isolated atom to form a negatively charged ion.

Electron affinity

Arrange as per the instruction :
(i) He, Ar, Ne (Increasing order of the number of electron shells)
(ii) Na, Li, K (Increasing Ionization Energy)
(iii) F, Cl, Br (Increasing electronegativity)
(iv) Na, K, Li (Increasing atomic size).

(i) He < Ne < Ar Reason — Number of electron shells increases as we move down the group. (ii) K < Na < Li Reason — Ionization Potential decreases as we…

Match the atomic number 2, 4, 8, 15 and 19 with each of the following:
(i) A solid non-metal belonging to the third period.
(ii) A metal of valency 1.
(iii) A gaseous element with valency 2.
(iv) An element belonging to Group 2.
(v) A rare gas.

(i) 15 (ii) 19 (iii) 8 (iv) 4 (v) 2

Select the correct answer — The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called ………. (electron affinity, ionization potential, electronegativity)

Ionization Potential

Fill in the blanks by selecting the correct word :
(i) If an element has a low ionization energy then it is likely to be ………. (metallic/non metallic).
(ii) If an element has seven electrons in it’s outermost shell then it is likely to have the ………. (largest/smallest) atomic size among all the elements in the same period.

(i) If an element has a low ionization energy then it is likely to be metallic. (ii) If an element has seven electrons in it's outermost shell then it is likely…

Use the letters only written in the Periodic Table given below to answer the questions :
I II III IV V VI VII O
1 L
2 Q E G J Z M
3 R
4 T

(i) State the number of valence electrons in atom J.
(ii) Which element shown forms ions with a single negative charge?
(iii) Which metallic element is more reactive than R?
(iv) Which element has it’s electrons arranged in four shells?

(i) Atom J has 5 valence electrons as it belongs to the fifth group in the periodic table. (ii) M forms ions with a single negative charge as it has 7 electrons in the…

Write the correct symbol > (greater than) or < (less than) in the statements :
(i) The ionization potential of potassium is ………. that of sodium.
(ii) The electronegativity of iodine is ………. that of chlorine.

(i) The ionization potential of potassium is < (less than) that of Sodium. (ii) The electronegativity of iodine is < (less than) that of chlorine.

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