The following data was collected during a laboratory research. The room temperature to the laboratory was 30 degrees celsius. A substance that appeared to be white, soft, and powdery was mixed with a transparent liquidy substance that was oderless. As the two substances were mixed in a beaker. a white airy foam began to rise from the surfae of the liquid. The temperature of the mixed substance is measured at 37 degrees celsius. Identify each observation is described in the senario. Identify it if its physical property, physical change, chemical property, or chemical change airy foam - white substance - powdery substance - temperature increase - liquidy substance - tranparent - soft powdery - odorless when miixed- Solubuity - mixture remained oderless - airy foam - white substance - powdery substance- temperature increase - liquidy substance - tranparent - soft powdery - odorless when miixed - Solubuity - mixture remained oderless-

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.