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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?
The nuclear radius is of the order of 10
-13 cm while atomic radius is of the order 10-8 cm. Assuming the nucleus and the atom to be spherical, what fraction of the atomic volume is occupied by the nucleus ?
what were the drawbacks of thomson model of atom
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????
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 ?
5 examples of isotopes and 5 examples of isobars
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?
What is the valency of copper?
EXPLAIN THE LAW OF CONSERVATION OF MASS WITH AN EXAMPLE ?
How many electrons can fit into the sub-shell for which n = 3 and l = 1?
the properties of electrons, protons and neutrons.
Calculate the no. of atoms of each element persent in 9.8 g of sulphuric acid, H2SO4. (H=1, S=32, O=16)
what are the application of isotopes
can someone give the answers plz...................
What are the drawbacks of Rutherfords atomic model?
An ion M3+ has 10 electrons and 14 neutrons
What is the atomic number and Mass number of M???
(please explain in detail)
difference between electrons protons and neutrons...also find the relation between the three
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 ?
Who discovered proton? Golstein or Rutherford?
What happens when an electron jumps from lower to higher energy levels?
Q1 Tabulate name of elements,their latin names and symbols.
will 35Cl and 37 Cl have different valencies ? justify your answer?
explain the rutherford's gold foil experiment with the help of diagram?
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.
Calculate the energy associated with photon of light having wavelength 6000 Angstrom . [ h = 6.624 x 10-27 erg - sec ]
Please help and explain .
why is the valency of phosphorus 3 & 5 both ?
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%).
How to learn the 30 elements of modern periodic table Quickly?
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 r the rules of distribution of electrons in different shells of an atom.Pls give me all rules of higher classes also.
What is the valency of Aluminium whose atomic number is 13 ? Give reason.
Why does Anode Rays depend on the nature of the gas present in the discharge tube ?
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.
an atom has complete k and l shells .is this an atom of metal ,nonmetal or noble gas?justify
what are properties of anode rays x rays cathode rays and alpha particles
What happens to an element Z if its atom gains 3 electrons?
wht r d drawbacks of bohr's model of an atom??
what is the atomicity of ammonia
Give 6 examples of isobars .........
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
State 3 characteristics of canal rays.
Suppose that there were two isotopes of Sodium. 28% of the naturally occurring sodium atoms had a mass of 22, and 72% atoms had a mass of 23. What would the average atomic weight of sodium be?
State two main postulates of Thomson model of an atom
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
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
is an isotope of noble gas radon . how many protons,neutrons&electrons are present in 1 atom isotope of radon?
applications and examples of isotopes an isobars ?
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.
what is difference between Isotopes, Isobars and Isotones
explain bohr's model of atom
give the atomic masses of important element for class 9
Which fundamental particle is equal in number in Mg2+ and Al3+ ions?
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.
is it possibe for the atom of an element to have one electron one proton and no neutron?if so name the element
difference between isotope and isobars
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.
Name three feature of rutherford's model
discrete orbits are also known as_____
what are cathode rays and anode rays?
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