A new element is discovered. This element shows very little reactivity with any other element on the Periodic Table, and it exists as a gas at room temperature. Which group would be the best classification for this new element?Alkali metalsHalogensTransition metalsNoble gasesWhich of the following best describes the properties of Group 1A (group 1) elements on the Periodic Table?Reactive metalsReactive nonmetalsUnreactive metalsUnreactive nonmetalsThe picture below shows the arrangement of electrons in atomic shells around the nucleus of four different elements. Which statement is true about the four elements?All elements belong to the same period. All elements belong to the same group. Elements 1 and 4 belong to the same group. Elements 2 and 3 belong to the same period. All of the alkaline earth metals are similar in that –they all have the same ionic charge. they are all artificially made elements. they all show variable valences. they all have similar atomic weights. The chart below describes the properties of four sets of elements: Set A, Set B, Set C, and Set D. These four sets of elements correspond to the properties of four actual groups on the Periodic Table. Which set of elements should fluorine be grouped with?Set ASet BSet CSet DIn what way did Mendeleev and other scientists arrange the Periodic Table during the 1800s?Elements were first arranged in order of increasing atomic weight and after that were grouped by similar properties. Elements were first arranged in order of increasing atomic number and after that grouped based on their weights. Elements were arranged in order of increasing melting points in order to group together solids, liquids, and gases. Elements were arranged in order of reactivity so that elements that reacted with each other were grouped together.