The electronic configuration of an element is 2,8,2. The hydroxide of this element can produce …………… hydroxyl ions per molecule.

(a) 3

(b) 2

(c) 1

(d) 0

An atom of X forms an ion according to the equation X ⟶ X+2. The atomic number of the atom X is: (a) 16 (b) 10 (c) 12 (d) 14

An element with the largest atomic radius among the following is: (a) Carbon (b) Nitrogen (c) Lithium (d) Beryllium

An element in period 3, whose electron affinity is zero: (a) Neon (b) Sulphur (c) Sodium (d) Argon

Electron affinity is maximum in: (a) Magnesium (b) Argon (c) Lithium (d) Bromine

Neon has the maximum ionization potential because its outermost shell is: (a) Unstable (b) Ready to accept electrons (c) Ready to lose electrons (d) Completely filled

Elements P, Q, and R are in the same period of the modern periodic table. P readily loses its one valence electron to form a stable ion. Q shares its electrons in bonding but does not form ions easily. R has high electronegativity. Answer the following questions based on the above information: (a) Which element would be most difficult to reduce among P, Q and R? (b) Which element is expected to have the smallest atomic radius among P, Q and R? (c) Arrange P, Q and R in order of decreasing ionisation potential.

Give reasons why: (a) Hydrochloric acid cannot form an acid salt. (b) Electronegativity increases across a period.

Given below are a few elements. Li, Li, K, Ca, F Identify the element which: (a) has the least atomic radius. (b) has two valence electrons. (c) is the most electropositive.

Name the following: (a) The most electronegative element of Period 2. (b) The largest atom of Period 3.

Element A belongs to group 15 and period 2 of the Periodic Table. (a) Identify the element A. (b) Write the formula of the compound formed when element A combines with hydrogen. (c) Draw the dot (•) and cross (×) structure of the compound formed in (b) above.

Fill in the blanks with the choices given in the brackets: (a) Metals are good ............... [oxidizing agents /reducing agents] (b) Non-polar covalent compounds are ............... [good / bad] conductors of heat and electricity. (c) Higher the pH value of a solution, the more is ............... [acidic / alkaline] it is. (d) ............... [Silver chloride / Lead chloride] is a white precipitate that is soluble in excess of Ammonium hydroxide solution. (e) Conversion of ethene to ethane is an example of ............... . [hydration / hydrogenation]

Given below are four ions: Cl−, Li+, Al3+, K+ Identify the pair of ions which have the same electronic configuration. [Atomic number: Cl = 17, Li = 3, Al = 13, K = 19] (a) Cl− & Li+ (b) Al3+ & K+ (c) Cl− & K+ (d) Li+ & K+