The volume of Nucleus is about :-
A `10^(-4)` times to that of an atom
B `10^(-15)` times to that of an atom
C `10^(-5)` times to that of an atom
D `10^(-10)` times to that of an atom

The density of nucleus is about………….times the density of atom.

1.The definition of one atomic mass unit and its value is (a) 1/12^(th) the mass of an atom of oxygen-16, 1amu= 1.6 times 10^(-19)Kg (b) 1/16^(th) the mass of an atom of carbon-12,1amu = 9.1 times 10^(-31)Kg (c) 1/12^(th ) the mass of an atom of carbon-12,1amu = 1.66 times 10^(-27)Kg (d) The mass of helium nucleus, 1amu= 3.2 times 10^(-27)Kg

A: 1 "a.m.u." = 1.66 xx 10^(-24) gram. R: Actual mass of one atom of C-12 is equal to 1.99 xx 10^(-23) g

6.023 xx 10^(22) atoms of Hydrogen can make

In Rutherford's nuclear model of the atom, the nucleus (radius about 10^(-15)m ) is analogous to the sun about which the electron moves in orbit (radius about 10^(-10)m ) like the earth orbits around the sun. If the dimensions of the solar system had the same proportions as those of the atom, would the earth be closer to or further away form the sun than actually it is ? The radius of earth's orbit is about is 1.5xx10^(11)m . The radius of the sun is taken as 7xx10^8m .

One atom of an element weighs 1*8xx10^(-22) g its atomic mass is

The radius of the first orbit of hydrogen atom is 0.52xx10^(-8)cm . The radius of the first orbit of helium atom is

The average mass of an atom of uranium is 3.9xx10^(-25) kg. Find the number of atom is 1 g of uranium.

Compute the difference in masses of 10^(3) moles of each of magnesium atoms and magnesium ions. (Mass of an electron =9.1 xx 10^(-31) kg)

The ionisation energy of 10 times innised sodium atom is