Periodic classification questions | form two Chemistry

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.

(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.

Answer / Solution

UNSOLVED

Study the portion of the periodic table given in the following table and answer the questions that follow:

1. Explain how ionisation energy of elements vary from Be to Mg and from B to O.
2. Name the types of bond formed when S combine with O. Give two properties of compounds of  such a bond.

Answer / Solution

UNSOLVED

Study the information in Table 1 and answer the questions that follow. (The letters are not the actual symbols of the elements).

Select the elements which belong to the same
(i) group
(ii) period.

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UNSOLVED

An element in the periodic table with atomic number 18 belongs to which of the following?
A Group I and period I.
B Group O and period III.
C Group III and period III.
D Group V and period IV.
E Group VII and period IV

Answer / Solution

UNSOLVED

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 2:8:8:1
D. 2:8:6 and 2:8:8:7

Answer / Solution

UNSOLVED