An atom of an element has two electrons in the valence shell and two c – InterviewSolution

InterviewSolution

1.	An atom of an element has two electrons in the valence shell and two consecutive inner shells have 8 electrons each. Calculate the atomic number of the element.
Answer» 19 20 30 18 Solution :Electronic CONFIGURATION of atom of ELEMENT which has two electrons in the valence shell and two consecutive inner SHELLS have 8 electrons each is 2,8,8,2. And hence atomic number is element=20

Discussion

No Comment Found

Related InterviewSolutions

What are the advantages of anrometer over mercury barometer? Give the applications of aneroid barometer.
Which of the following metals on treatment with concentrated alkali gives hydrogen gas?
Tyndal effect cannot be shown by
Which among the following salts produces maximum number of metal ions per molecule when dissolved in a suitable solvent ?
What makes the use of hydrogen as a fuel difficult ? Give reasons in support of your answer.
Why are the double decomposition rcac:Lions also called double dispbcement reactions?
Which property of German silver makes it useful for makingimitation jewellery?
What do you mean by desiccating agent ?
Which among the following elements does not float on water /
What is the method of separation of (a) N_(2)-CO_(2) mixture, (b) H_(2) -O_(2) mixture, (c ) NH_(4)Cl, KCl and sand mixture, (d) Ink-water mixture