Oxygen (o) is a gas found in the 16th column of the periodic table. what statement is true about oxygen and the other elements in that column?

Oxygen is the most abundant element in erath's crust (46 % by weight). Oxygen is present in Group 16 in the periodic table. The other elements in this period are: Sulphur (S), Selenium (Se), Tellurium (Te). The general electronic configuration of the elements present in Group 16 is: ns² np⁴. Oxygen is smallest in size among other elements in the same group. It exists as O₂ molecule where O=O bond is found. These O₂ molecules are associated through  van der Waal's force of attraction which are very weak, because of that O₂ exists as gas. Except oxygen, other elements do not form divalent molecule and they have  d-orbitals, so they can show catenation property by which large number of atoms are connected via covalent bonds. Hence those elements are not gaseous. Sulphur, Selenium and Tellurium are solid,

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.