Advertisements
Advertisements
प्रश्न
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
विकल्प
Cu, Fe, Zn, Al
Al, Cu, Fe, Zn
Zn, Al, Cu, Fe
Fe, Zn, Al, Cu.
उत्तर
Cu, Fe, Zn, Al
APPEARS IN
संबंधित प्रश्न
What is periodicity in properties of elements with reference to the Modern Periodic Table?
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Write the merits of the modern periodic table over Mendeleev’s Periodic table
How were the positions of isotopes of an element decided in the modern periodic table?
On which side of the periodic table will you find metals?
Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?
Which element has two shells, both of which are completely filled with electrons?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
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?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
What is the usual number of valence electrons and valency of group 18 elements of the periodic table?
What are the groups in a periodic table? Give two characteristics of each.
Name two elements in each case:
Actinides
What do you understand by typical elements?
Answer the following in respect of element `31/15 P`
Give its electronic configuration
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
How many periods and groups are there in the modern periodic table?
What is the number of elements in the 1st period?
The horizontal rows in a periodic table are called _____.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Give the symbol and valency of the following element and radical.
Oxygen [Oxide]
Give the symbol and valency of the following element and radical.
Bisulphate
Give the symbol and valency of the following element and radical.
Sulphate
State what is meant by the term chemical formula.
Give the chemical formula of ammonium sulphate
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
The d-block elements are called as _______ elements.
Group 13 to 18 : p block : : _______ : d block
Find the odd one out and give its explanation.
The modern periodic table is divided into which blocks?
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
State any five features of modern periodic table.
Which of the following elements does not lose an electron easily?
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
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 a similar structure to diamond.
______ group elements are called alkaline earth metals.
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its electronic configuration.
