Consider the following statements:
A) Calcium is present in S-block of the periodic table.
B) Metals comprise more than 78% of all known elements and appear on the left side of the Periodic Table.
C) d- Block elements are also known as inner-transition electrons.
Let's examine each statement to determine which are true:
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Statement A: "Calcium is present in the S-block of the periodic table."
Explanation: The S-block elements consist of groups 1 and 2 of the periodic table. Calcium (Ca) is an alkaline earth metal in group 2. Therefore, it is indeed present in the S-block.
Conclusion: This statement is true. -
Statement B: "Metals comprise more than 78% of all known elements and appear on the left side of the Periodic Table."
Explanation: Metals are the majority of elements in the periodic table, appearing primarily on the left side and extending into the middle. They include alkali metals, alkaline earth metals, transition metals, and some post-transition metals. Indeed, more than 78% of the elements are metals.
Conclusion: This statement is true. -
Statement C: "d-Block elements are also known as inner-transition elements."
Explanation: The d-block elements are transition metals, which are elements found in groups 3 to 12 of the periodic table. However, the term "inner-transition elements" specifically refers to the f-block elements, which include the lanthanides and actinides.
Conclusion: This statement is false.
Based on the above explanations, only statements A and B are true. Therefore, the correct answer is the option "Both A and B is true".
Important Questions from Periodic Table
Mica is mainly used in:
Which among the following is the popular method for manufacture of ammonia?
Dry ice is used on a performing stage to produce mist in air. The process involved is an example of
Which one of the following metals floats in cold water?
Liquid vegetable oils are converted to solid margarine by the use of
