Advertisements
Advertisements
प्रश्न
How does the number of valence electrons vary on moving from left or right in the first period of the periodic table?
उत्तर
In the first period of the periodic table, the number of valence electrons increases from 1 to 2, on moving from left to right.
APPEARS IN
संबंधित प्रश्न
Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid elements.
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is ______.
How does the valency of elements change of moving from left to right in the third period of the periodic table?
An element X belong to 3rd periods and group II of the periodic table state:
the number of valence electrons,
Name the element which has the electronic configuration 2, 8, 3?
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
The ion of which element will migrate towards the cathode during electrolysis?
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The similarities in the properties of elements belonging to a group are because they have the same ______
Use the letters only written in the Periodic Table given below to answer the questions that follow:
(a) State the number of valence electrons in the atom J.(b) Which element shown forms ions with a single negative charge?
(c) Which Metallic element is more reactive than R?
(d) Which element has its electrons arranged in four shells?
Arrange the following as per instruction given in the bracket.
Li, K, Na, H ( decreasing order of their potential ionisation )
Write the electronic configuration of element 17T35.
- What is the group number of T?
- What is the period number of T?
- How many valence electrons are there in an atom of T?
- What is the valency of T?
- Is it a metal or non-metal?
- State number of protons and neutrons in T.
