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