Flash Card
The d-block elements are called as ............ elements.
Calcium, strontium and ............. form a Dobereiner's traid.
The elements of group 17 are called........... .
A student was asked to select two elements in a periodic table. He selects neon and argon. In both these elements, the number of electrons in the outermost shell is......... .
Lithium (Li), ............. and potassium(K) is Dobereiner's traid.
On moving from left to right in a periodic table, the size of the atom............. .
The maximum electron capacity of N shell is............. .
Atomic radius is expressed in the unit............. .
Identify the element which does NOT belong to period 3.
Which among the following elements would lose an electron easily?
.................. is the distance between the nucleus of the atom and its outermost shell.
The lanthanide and actinide series at the bottom form the ........... block.
Which of the following element has valency equal to 0?
According to Mendeleev's prediction, what is the nature of the oxide formed by the element eka-aluminium?
According to Mendeleev's periodic law, properties of elements are periodic function of their......... .
Which of the following statements is CORRECT regarding to Newlands' octaves?
The correct decreasing order of atomic radius is:
Valency of the elements in the halagen family is............ .
Valency of oxygen is........ .
X and Y are two elements having similar properties which obey Newlands's Law of Octaves. The minimum number of elements in between X and Y is ................. .
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in......... .
Which of the following is a metalloid?
Among the following,............ is the most electronegative element.
Halogen which is liquid at room temperature is ............ .
The molecular formula of gallium oxide is ............ .
Which of the following is the lightest inert gas?
Which among the following has the largest atomic radius?
Which pair of elements will have similar properties?
Dobereiner laid down the ............ rule.
At the time of Mendeleev .............. elements were known.
Which is the most electropositive element in period 2?
Which of the following is CORRECT?
The number of electrons in the outermost shell of alkali metals is......... .
In the modern periodic table, the elements are arranged in accordance with their .......... .
CORRECT increasing order of atomic radius in alkaline earth metal is............. .
The metallic character of elements............. in a group from top to bottom.
Electronic configuration of element X is 2, 8, 2. It belongs to............ in the modern periodic table.
Newlands Law of Octaves is applicable up to
The formula of compound formed in the reaction between calcium and fluorine is:
In which block of the modern periodic table are the nonmetals found?
In modern periodic table, the number of groups and periods are ......... and ........... respectively.
For elements of period 2, ............ is the outermost shell occupied by electrons.
Which pair of atomic numbers represents elements in the same group?
Phosphorus is placed in......
The maximum electron capacity of L shell is............. .
Valency of elements............. in a period from left to right.
Dobereiner's traids are the group of 3 elements with ............. .
The groups 1 and 2 constitute the ........... block.
........... is the first element of group 16.
The element eka-silicon in Mendeleev's periodic table is known as .............. in the modern periodic table.
