Advertisements
Advertisements
प्रश्न
Which element has two shells, both of which are completely filled with electrons?
उत्तर
Neon with atomic number 10.
Electronic configuration:- Shells: K L
Electrons arranged: 2 8
APPEARS IN
संबंधित प्रश्न
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
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 the fundamental difference in the electron configurations between the group 1 and group 2 elements?
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
Name and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
Answer the following question.
Define the atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so?
Give the symbol and valency of the following element and radical.
Calcium
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has same valency as Lithium.
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
