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