Question

3. Answer all the questions.

(i) Describe the position of Potassium in the periodic table. (Group and period number)
(ii) State the two gaseous element within first 20 elements.
(iii) Which element is the lightest within first 20 element.
The following questions may be over the first 20 elements.
(iv) State the element names of these symbols.
Ag =
Zn =
Pb=
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Answer 1

Potassium is in Group 1 and Period 4. Hydrogen and helium are gaseous elements within the first 20 elements, and hydrogen is the lightest element. The element names for the given symbols are silver, zinc, and lead.

Step-by-step explanation:

(i) Potassium is located in Group 1 and Period 4 of the periodic table. Its group number indicates that it belongs to the alkali metals, while its period number tells us that it is in the fourth row of elements.

(ii) Two gaseous elements within the first 20 elements are hydrogen (H) and helium (He).

(iii) Hydrogen (H) is the lightest element within the first 20 elements with a mass of approximately 1 atomic mass unit (AMU).

(iv) The element names of the given symbols are:

1. Ag - Silver
2. Zn - Zinc
3. Pb - Lead

Learn more about Position of elements in the periodic table