Name the type of elements which have two outermost shell incomplete.

One Line Answer

Transition elements

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Chapter 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [Page 5]

Chapter 1 Periodic Table, Periodic Properties and Variations of Properties
lntext Questions | Q 15. (iii) | Page 5

How many rows and columns are there in the modern periodic table?

Why do all the elements of the same group have similar properties?

What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.

The modern periodic table was prepared by ______.

What is the number of valence electrons in the atoms of first elements in a period?

Give the chemical formula of sodium hydroxide

Fill in the blank:

The element lithium in the Modern Periodic Table with valency 1⁺ belongs to the group ______.

Write a scientific reason.

There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.

Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

Which one of the following elements exhibit maximum number of valence electrons?