Structure of At...

How many carbon atoms are present in palmitic acid?

The effective atomic number of Mn,in $$Mn_{2}(CO)_{10}$$is _____.

If the Thomson model is correct what should be the observation in the $$\alpha  - ray$$ scattering  experiment 

If an electron moves away from nucleus, its potential energy:

Which of the following pairs is not correctly matched 

$$E_n=-\dfrac{313.6}{n^2}$$, if the value of $$E_i=-34.84$$ to which value '$$n$$' corresponds:

The atomic number of an element represents :

The energy of electron in the excited state of hydrogen atom is $$-0.85 eV$$. If 'h' is Plank's constant, the angular momentum of electron in the excited state is :

$$\dfrac { weight\quad of\quad one\quad atom\quad of\quad an\quad element }{ Its\quad atomic\quad weight } =x.$$
$$\dfrac { weight\quad of\quad one\quad molecule\quad of\quad a\quad compound }{ Its\quad molecular\quad weight } =y.$$
Then, x : y is

The average atomic mass of a sample of an element X is 16.2u. What are the percentage of isotope $$^{16}_8X$$ and $$^{18}_8X$$ in the sample respectively?