Let's Burn 52 Calories! 1  11 mins. Swimming, treading water, moderate effort. 2  6 mins. Running, general. 3  6 mins. Bicycling, general. 4  14 mins. Walking, 2.5 mph, level, firm surface.
It is also worthy to note that Mendeleev's 1871 arrangement was related to the atomic ratios in which elements formed oxides, binary compounds with oxygen whereas today's periodic tables are arranged by increasing atomic numbers, that is, the number of protons a particular element contains.t is also worthy to note that Mendeleev's 1871 arrangement was related to the atomic ratios in which elements formed oxides, binary compounds with oxygen whereas today's periodic tables are arranged by increasing atomic numbers, that is, the number of protons a particular element contains.
Periodic Table of the Elements. The periodic table is an arrangement of the chemical elements that is a powerful tool for studying those elements and how they combine. The elements are arranged in rows according to their atomic number and in columns according to their valence electrons or number of electrons in the outer shell.