What are the SEVEN DiAtomic molecules? List them and explain why there are DiAtomic and NOT MonAtomic molecules.

See explanation

Explanation:

The seven elements that form diatomic molecules are:

Hydrogen (H) => H₂

Nitrogen (N) => N₂

Oxygen (O) => O₂        

Fluorine (F) => F₂

Chlorine (Cl) => Cl₂  

Bromine (Br) => Br₂

Iodine (I) => I₂    

How to remember the '7' diatomics => look at periodic table and draw a horizontal line starting at Nitrogen (N) through Fluorine (F), then a vertical line from Fluorine (F) through Astatine (As). The lines drawn make the number '7'. One only need to remember Hydrogen (H) also belongs to the set of elements forming diatomic molecules.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.