Monovalent `Na^+`, `K^+` ions and divalent `Ca^(2+)` , `Mg^(2+)` ions are found in large proportions in biological fluids. Give the name of the metal present in Chloro phyll.

Monovalent Na^+ , K^+ ions and divalent Ca^(2+) , Mg^(2+) ions are found in large proportions in biological fluids. What are the major roles of these Na and K ions in our body ?

Monovalent Na^+ , K^+ ions and divalent Ca^(2+) , Mg^(2+) ions are found in large proportions in biological fluids. In which part of our body are sodium and potassium ions prominently located?

Monovalent Na^+ , K^+ ions and divalent Ca^(2+) , Mg^(2+) ions are found in large proportions in biological fluids. For making which parts of our body, calcium is mainly used?

A group of ions are given below: Na^+ , Al^3+ , O^2- , Ca^2+ , Mg^2+ , F^- , N^3- , Br^- a) Find the pair which is not isoelectronic. b) Arrange the above ions in the increasing order of size.

In CaF2 crystal, 'Ca^2+'. îons are present in fcc arrangement. How many 'F-' -ions are present in the unit cell?

Assertion : Calgon is used in the manufacture of soft water used for laundry purpose Reason : Ca^(2+) and Mg^(2+) ions present in hardwater are rendered ineffective by calgon forming their soluble complexes. (I) If both assertion and reason are correct and reason is the correct explanation of assertion. (II) Both assertion and reason are correct but reason is not the correct explanation of assertion (III) If assertion is correct and reason is not correct (IV) Assertion is wrong and reason is correct

K^+ and Ca^(2+) are isoelectronic with Argon. Explain what is isoelectronic ions.

Group of ions are given below: Na^+ , Al^(3+) , O^(2-) , Ca^(2+) , Mg^(2+) , F^- , N^(3-) , Br(-) Two of the above ions are not isoelectronic. Identify them.

Observe the following ions. F^- , Na^+ , Mg^(2+) , O^2- Arrange them in the order of increasing size.

The ions 'O^(2-), F^-, Na, Mg^(2+)' and 'Al^(3+)' are isoelectronic. Their radii show: