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