Advertisements
Advertisements
Question
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Solution
Generally, hydrogen is treated as a special element and placed alone at the head of the periodic table. The position of hydrogen in the periodic table is unclear because it resembles both the alkali metals and halogens in some of its properties. However, it is placed in the first group, above all the alkali metals in the modern periodic table because its electronic configuration is similar to that of alkali metals. But due to the small size of hydrogen, it exhibits properties different from that of the alkali metals.
APPEARS IN
RELATED QUESTIONS
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Give two example of group 18 elements.
What is the name of those elements which divide metals and non-metals in the periodic table?
The modern periodic table was prepared by ______.
In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
Give the symbol and valency of the following element and radical.
Magnesium
State the number of elements in Period 3 of the Periodic Table.
Group 13 to 18 : p block : : _______ : d block
Which of the following elements will form an acidic oxide?
