Structure of At...

The penultimate and outermost orbit of an element contains $$10$$ and $$2$$ electrons respectively. If the outermost orbit is fourth orbit, the atomic number of the element should be

Magnesium hydroxide is the white milky substance in milk of magnesia. What mass of $$Mg(OH)_{2}$$ is formed when $$15 ml$$ of $$ 0.2 M - NaOH $$ is combined with $$12$$ ml of $$ 0.15 M - MgCl_{2}?$$

$$K$$ and $$L$$ shell of an element are completely filled and there are $$16$$ electron in $$M-$$ shell and $$2-$$ electrons in $$N-$$ shell. The atomic number of the element is

What is the value of n for L-shell?

Wireless mouse works on which technology?

How many unpaired electrons are present in ground state of chromium $$(Z=24)$$?

In the sixth period, the orbitals are filled as : 

In the sixth period of the extended from of periodic table, the orbitals are filled as:

The effective atomic number of cobalt in the complex $$[Co(NH_3)_6]^{3+}$$ is:

An element X belongs to fourth period and fifteenth group of the periodic table. Which one of the following is true regarding the outer electronic configuration of X? It has: