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