Question

Ques. Three elements X, Y, and Z with their atomic numbers are given below:

Element
Atomic Number
X
16
Y
18
Z
19
Examine the above data and answer the following questions:
A) How many valence electrons are present in Y? What is its valency?
B) Write the position of X and Z in the Modern Periodic Table.
C) Write the molecular formula formed between X and Z​

Answer 1

Answer:

a) 1

b) 16th group and 3rd period , 18th group and 3rd period

c) x-sulphar and z- potasium

product is pso4

Answer 2

Answer:

The correct answer to this question is Since element X has an atom with four valence electrons, it will appear in group 4 + 10 = 14 of the current periodic table.

Explanation:

Given - Three elements X, Y, and Z with their atomic numbers

To Find - Examine the above data and answer

Since element X has an atom with four valence electrons, it will appear in group 4 + 10 = 14 of the current periodic table.

(ii) Since element Y contains 6 valence electrons, it belongs to group 6 + 10 = 16 of the current periodic table.

periodic chart

(iii) Since element Z only contains one valence electron, it will be in group 1 of the current periodic table.

(b) A metal element and a non-metal element form an ionic bond. The elements Z and Y will mix to produce ionic bonds because element Z of group 1 is a metal and element Y of group 16 is a non-metal (please notice that element X of group 14 is also a non-metal 'carbon' but it does not combine with metals to form ionic bonds).

The valency of the element Z is 1 (or 1+) because it possesses one valence electron. The valency of element Y will be 2 (or2-) since it possesses 6 valence electrons.

(d) Two non-metal components come together to create a covalent bond. Because element X of group 14 and element Y of group 16 are both non-metals in this instance, they will mix to create covalent bonds.

(e) The element X has a valency of four because it possesses four valence electrons. The valency of the element Y is two because it possesses six valence electrons. This indicates that a covalent compound with the formula XY2 will be created when one atom of element X and two atoms of element Y mix.

(f) Rakshit demonstrated the following qualities in responding to these inquiries: I Understanding contemporary element classification (ii) Knowledge of the periodic table and chemical bonds; and (iii) Capabilities for problem-solving.

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