Advertisements
Advertisements
प्रश्न
Name two elements in Alkali metals.
Advertisements
उत्तर
Sodium and potassium.
APPEARS IN
संबंधित प्रश्न
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
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.
Name the type of elements which have outermost shell incomplete.
How does the electronic configuration of an atom relate to its position in the modern periodic table?
The horizontal rows in a periodic table are called _____.
Give the chemical formula of sodium nitrate
State the number of elements in Period 1 of the Periodic Table.
The amount of energy released when one or more electrons is added to the neutral atom is ______
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
