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write 5-6 differences between isobars and isotopes in a tabular form .
what is the difference between sodium ion and sodium atom ?
how to find valency of an element?
Q :If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom and (ii) what is the charge on the atom?
ANS:(i) The atomic number is equal to the number of protons. Therefore, the atomic number of the atom is 8.
(ii) Since the number of both electrons and protons is equal, therefore, the charge on the atom is 0.
My Q: Why is the charge on the atom 0????
what were the drawbacks of thomson model of atom
what is the atomicity of ammonia
Calculate the number of molecules in 8g of Oxygen ?
find the valency of sulphur .[atomic no.=16
Z = 3, what would be the valency of the element? Also, name
what are canal rays ?
will 35Cl and 37 Cl have different valencies ? justify your answer?
5 examples of isotopes and 5 examples of isobars
the following data represents the distribution of electrons ,protons and neutrons in atoms of four elements A, B, C, D.
ELEMENTS PROTONS NEUTRONS ELECTRONS
A 19 21 19
B 17 18 17
C 17 20 17
D 18 22 18
Answer the following:
1. describe the electronic distribution in atom of element B.
2. is element B a metal or non-metal? why?
What is the valency of copper?
EXPLAIN THE LAW OF CONSERVATION OF MASS WITH AN EXAMPLE ?
the properties of electrons, protons and neutrons.
what are the application of isotopes
What are the drawbacks of Rutherfords atomic model?
discrete orbits are also known as_____
difference between electrons protons and neutrons...also find the relation between the three
is it possibe for the atom of an element to have one electron one proton and no neutron?if so name the element
Q.1. How many molecules are present in
(a) 9 grams of water
(b) 17 grams of amonia
Q.2. Calculate the number of moles in 17 grams of H2O2
Q.3. Show that 12 grams of carbon-12 contains 6.023 x 1023 atoms of 12C
Q.4. What is the mass of one atom of hydrogen ?
Q.5. How many moles of Mg atoms are there in 100 grams of magnesium ?
Q.6. Neon gas consist of single atoms. What mass of neon contains 6.023 x 1023 atoms ?
What happens when an electron jumps from lower to higher energy levels?
Who discovered proton? Golstein or Rutherford?
An element X contains 6 electrons in M shells as valence electrons. What is the atomic number of X and also identify wheather X is metal or non metal?
Q1 Tabulate name of elements,their latin names and symbols.
Element A and B have atomic numbers 18 and 16 respectively.Which of these two would be more reactive and why?
How many electrons can fit into the sub-shell for which n = 3 and l = 1?
explain the rutherford's gold foil experiment with the help of diagram?
An ion M3+ has 10 electrons and 14 neutrons
What is the atomic number and Mass number of M???
(please explain in detail)
what is electrovalency and covalency
(a) What are isobars? Give one example. (b) Write any two uses of isotopes
Write two differences between isobars and isotopes.
why is the valency of phosphorus 3 & 5 both ?
In the following table the mass number and the atomic number of certain elements aregiven.Elements A B C D EMass No. 1 7 14 40 40At. No. 1 3 7 18 20(a) Select a pair of isobars from the above table.(b) What would be the valency of element C listed in the above table?(c) Which two subatomic particles are equal in number in a neutral atom?
How to learn the 30 elements of modern periodic table Quickly?
Calculate the no. of atoms of each element persent in 9.8 g of sulphuric acid, H2SO4. (H=1, S=32, O=16)
what r the rules of distribution of electrons in different shells of an atom.Pls give me all rules of higher classes also.
Why does Anode Rays depend on the nature of the gas present in the discharge tube ?
What is the valency of Aluminium whose atomic number is 13 ? Give reason.
what is the valency of gold, silver and lead and can you explai how we can find the valency of a compound like NH4, SO2, CO3 etc.
You are given an element 7X14.Find out.
a.1.number of protons,electronsneutrons in X
a.2.valency of X
a.3.electronic configuration of X.
b.If Bromine atom is available in the form of, say two isotopes
35BR79 (49.7%) 35BR82 (50.3%).
what are properties of anode rays x rays cathode rays and alpha particles
wht r d drawbacks of bohr's model of an atom??
Give 6 examples of isobars .........
Which fundamental particle is equal in number in Mg2+ and Al3+ ions?
valency of carbon in CH4 , C2H6 , C2H4 , C2H2 ???
discovery of electrons
Calculate the percentage of
[a] Water of crystallization in CuSO4.5H2O
[B] Potassium in K2CO3
[c] Oxygen in 22g of CO2
[D] Hydrogen in 36g of water
elements from A to E have in them the distribution of electrons,protonsand netron as follows
element electrons neutrons protons
A 4 4 3
B 8 9 9
C 18 22 18
D 17 20 17
E 17 18 17
MAKING USE OF THIS DATA FIND CATION, ANION, A PAIR OF ISOTOPES, AN ATOM OF NOBLE GAS
THIS QUESTION IS THERE IN MY ASSIGNMENT WHICH I HAVE TO SUBMIT ON MONDAY PLEASE ANSWER IT AS FAST AS POSSIBLE PLEASE
State 3 characteristics of canal rays.
State two main postulates of Thomson model of an atom
what is the work done by an electron revolving ina circular orbit of radius "r" around a nucleus.
Calculate number of neutrons present in 12 × 1025 atoms of oxygen (8O17). (Given NA = 6 × 1023 atoms)
(A) 1800 (B) 1600 (C) 1800 NA (D) 3200 NA
applications and examples of isotopes an isobars ?
can someone give the answers plz...................
the description of atomic particles of two elements X and Y is given below:
protons 8 8
neutrons 8 9
electrons 8 8
i) what is the atomic number of Y?
ii) what is the mass number of X?
iii) what is the relation between X and Y?
iv) which element/elements do they represent?
v) write the electronic configuration of X.
vi) write the cation/anion formed by the element.
Both helium and beryllium have two electrons in the valency shells. Helium is a noble gas where as beryllium is a metal. justify?
what is difference between Isotopes, Isobars and Isotones
What happens to an element Z if its atom gains 3 electrons?
give the atomic masses of important element for class 9
an element X forms an oxide with formula X2O3
state the valency of X,write the formula of chloride of X and sulphate of X.
if rutherford had taken beta particles instead of alpha particles in his model of atomic theorythen what would happen ?
difference between isotope and isobars
'SO2 is an air pollutant released during burning of fossil fuels & from automobile exhaust'.
The electronic configuration of potassium(K) is 2,8,8,1 instead of 2,8,9 thogh the M shell can accommodate up to 18 electrons. Explain
who discovered the proton? E. goldstein or rutherford?
write three significant features of Bohr's model of an atom.
An atom of an element has 7 electrons in its L shell
1)what is its atomic no.?
2)State is valency.
3)Identify the element.
Name three feature of rutherford's model
what are cathode rays and anode rays?
explain bohr model of an atom !?
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