Arrange the following sets of elements according to increasing first ionization energy and according to increasing metallic character. S, Sr, Se, O, Ba, Ca

Explanation:

Given elements:

   S, Sr, Se, O, Ba, Ca

We are to sort the elements:

1. based on their increasing first ionization energy

2. based on their increasing metallic character

First ionization energy is the energy needed to remove the most loosely bonded electron of an atom in the gas phase in the ground state.

  Ionization energy decreases down the group and increases across the period;

 So;

            Ba < Sr < Ca < Se < S < O

Metallic character is the electropositivity of an element. The agility to lose electrons is a measure of an atom's electropostivity;

  Down a group metallic character increases and across a period it reduces.

           O < S < Se < Ca < Sr < Ba

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

idk i'm not smart

explanation:

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