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प्रश्न
Match the atomic number with the following:
An element of group 2.
पर्याय
19
15
8
4
2
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उत्तर
4
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संबंधित प्रश्न
Explain why, the noble gases are placed in a separate group.
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
What is a period in a periodic table?
What are the groups in a periodic table? Give two characteristics of each.
How many groups and periods does the modern periodic table have?
Name the type of elements which have one electron short of octet.
How does number of (i) valence electrons (ii) valency; vary on moving from left to right in the second period of a periodic table?
Identify gas A in the following experiment.
Which of the following is the outermost shell for elements of period 2?
Which of the following elements would lose an electron easily?
