Would you expect the first ionization enthalpies for two isotopes of the same element to be the same of different? Justify you answer.

Atoms of two different elements are represented in the following diagram. Do these elements belong to the same group ? Justify your answer.

Isotopes are the atoms of the same element having__________

Rewrite the sentence after filling the blank: Isotopes of the element have the same -----properties.

How would you explain the fact that the first ionization enthalpy of sodium is lower than that of magnesium but its second ionization enthalpy is higher than that of magnesium?

Rewrite the following statement selecting the correct option: Isotopes of an element have the same number of-----

What is corrososion?Do gold omaments corrode? Justify you answer

Elements of Group 16 generally show lower values of first ionization enthalpy compared to the elements of corresponding period of group15. why?

If the number of atoms of each element is not same on the two sides of an equation.

Answer the following questions: The focal length of a concave mirror is 15cm. Where should on object be placed in front of this mirror so as to obtain an image which is real, inverted and of the same size as the object? Justify your answer.

Do different species of plants growing in the same area, show the same rate of transpiration at a particular time? Justify your answer.