Advertisements
Advertisements
Question
Fill in the blank:
The modern periodic table consists of ……………. periods.
Advertisements
Solution
The modern periodic table consists of 7 periods.
APPEARS IN
RELATED QUESTIONS
Why do all the elements of the same group have similar properties?
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
State modern periodic law.
Fill in the following blank with suitable word:
Group 18 elements are called ...............
How were the positions of isotopes of an element decided in the modern periodic table?
The three elements having chemical symbols of Si, B and Ge are:
(a) all metals
(b) all non-metals
(c) all metalloids
(d) Si is metalloid, B is metal and Ge is non-metal
Which element has the electronic configuration 2, 8, 2?
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
What is the usual number of valence electrons in the atoms of the last element in a period?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
An element X belongs to 3rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element
Give the group number of following elements present in periodic table
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Name the type of elements which have outermost shell complete.
State its position in the periodic table?
What is the main characteristic of the last element in each period of the periodic table?
State the modern periodic law for the classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
The horizontal rows in a periodic table are called _____.
Define the atomic size.
Give the symbol and valency of the following element and radical.
Nitrate
Compare Modern Periodic Law with Mendeleev's Periodic Law.
The groups 1 and 2 constitute the ______ block.
The d-block elements are called as ______ elements.
Find the correlation:
Group 13 to 18 : p block : : ______ : d block
Answer the following question in one sentence.
The modern periodic table is divided into which blocks?
Right or wrong sentence.
The K and L shells of the elements Na and Mg contain electrons.
______ forms the basis of the modern periodic table.
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
In the modern periodic table, elements are arranged according to their ______
What is the symbol of the element Tungsten?
An element which is an essential constituent of all organic compounds belongs to
Which of the following elements will form an acidic oxide?
Compare the radii of two species X and Y. Give reasons for your answer.
- X has 12 protons and 12 electrons
- Y has 12 protons and 10 electrons
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has same valency as Lithium.
Group 16 elements are collectively called as ______.
Define groups of modern periodic table.
Select the appropriate options and complete the following paragraph:
(metals, non-metals, metalloids, four, seven, s-block, p-block, d-block, f-block).
On the basis of electronic configuration, elements in the modern periodic table are classified Into ______ blocks. Groups 1 and 2 elements are included in ______ and all these elements are metals. (except Hydrogen). Group 13 to 18 elements are included in ______. This block contains metals, non-metals and metalloids. Group 3 to 12 elements are included in ______ and all the elements are ______ elements shown at the bottom of the periodic table i.e. Lanthanides and Actinides constitute ______ and all these elements are metals.
