What are histones ? What are their functions ?

Oxygen exists as three isotopes ._(8)^(16)O,_(8)^(17)O,_(18)^(18)O with relative abundance 90%,7% and 3% repectively What is average atomic mass of oxygen? .

How many alpha and beta particles will be emitted by an element 84^(A^(218)) is changing to a stable isotope of 82^(B^(206))

In a periodic table the average atomic mass of magnesium is given as 24.312 u. The average value is based on their relative natural abundance on earth. The three isotopes and their masses are ""_(12)^(24)Mg (23.98504u), ""_(12)^(25)Mg (24.98584u) and ""_(12)^(26)Mg (25.98259u) . The natural abundance of ""_(12)^(24)Mg is 78.99% by mass. Calculate the abundances of other two isotopes.

The three stable isotopes of neon: ""_(10)^(20)Ne,""_(10)^(21)Ne and ""_(10)^(22)Ne have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u, respectively. Obtain the average atomic mass of neon.

Uranium has two isotopes of masses 235 and 238 units. If both are present in Uranium hexafluoride gas which would have the larger average speed ? If atomic mass of fluorine is 19 units, estimate the percentage difference in speeds at any temperature.

Write the names of isotopes of hydrogen what is the mass ratio of these isotopes ?

Name the isotopes of hydrogen.

Deuterium Tritium are the Isotopes of -

Identify the pairs which are not of isotopes