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