Three elements, X, Y and Z, are in the same period of the periodic table. The oxide of X is amphoteric, the oxide of Y is basic and the oxide of Z is acidic. Which of the following shows the elements arranged in order of increasing atomic number?

1.   X, Y, Z
2. Y, Z, Y
3. Z, X, Y
4. Y, X, Z
5. X, Z, Y.

Which of the following electronic configurations are of metals?

A. 2:8:1 and 2:5

B. 2:8:2 and 2:6

C. 2:8:3 and 2:8:8:7

D. 2:8:6 and 2:8:8:7

When referring to the modern Periodic Table, the transition elements are found between:

1. Group I and II
2. Group I and III
3. Group II and III
4. Group III and IV

  An element in the periodic table with atomic number 18 belongs to which of the following?

1. Group I and period I.
2. Group O and period III.
3. Group III and period III.
4. Group V and period IV.
5. Group VII and period IV.

Which of the following sets of symbols represent isotopes of a single element?

1.  ¹⁶  ₈  X,  ¹⁷  ₈  X,  ¹⁸  ₈  X

2.  ¹⁶  ₈  Z,  ¹⁷  ₈  Z,  ¹⁸  ₈  X

3.  ¹⁶  ₇  P,  ¹⁶  ₈  P,  ¹⁶  ₉  P

4.  ¹⁶  ₇  K,  ¹⁷  ₈  K,  ¹⁸  ₉  K

5.  ¹⁶  ₇  U,  ¹⁶  ₈  U,  ¹⁸  ₁₀  U

5. (a) Study the following part of the periodic table and List down the names of all the missing elements. Table 1

 Match the items in List A with the responses in List B by writing the letter of the correct response beside the item number in the answer book provided.

Answer all questions in section. 

3. (a)Study the following portion of the periodic table with some elements represented by letters and answer the questions that follow.

 (i) State how electronegativity varies from A to C and from B to D . 

(ii) Write the electronic configurations of A, C^2-, D and B.

4. (a) Consider elements with atomic number 1, 11, 12 and 17.

(i) What are the types of oxides formed by elements with atomic number 11 and 12?

(ii)  Write an equation which represents a reaction between the element with atomic number 1 and 17.

(iii) Write a balanced chemical equation between the oxide of the element with atomic number 11 and aqueous solution of the compound formed in 4 (a) (ii).

 Study the following part of the periodic table and then answer the questions that follow. Note: The letters used are not scientific symbols for the elements concerned.

Group

(a) Identify and write down the electronic configuration for the elements K, N, P and L.

(b) What type of bond will exist in a compound formed when Q combines with L? Write the chemical formula for the compound formed and list two chemical properties for the compound formed.

7.(a) Study the following Periodic Table and then answer the questions that follow.

(i)Write the collective name of elements in:

 Group Il ..                             Group VIII

(ii)Name the elements which are represented by the following letters:

(iii)Write the electronic configuration of the following elements:

3.(a) Define the following terms:

(i)       Emulsions

(ii)     A solution

(iii)   Atom

(iv)    Radical

(a) Study the following periodic table and then answer the questions that follow:

(i) Name elements named by the following letters: S, W, X, Z

(ii) Write the electronic configuration for the elements represented by the following letter.

10.Mention four chemical properties of Oxygen.

(b)      Find the oxidation number of each of the underlined elements in the following: (i) KC103

(ii)

Use the IUPAC system to name each of the following chemical compounds:

    (i) Cuo                                 (ii) CaSO4

 (iii) HN03                               (iv) ZnC12