What is similar for elements located next to one another anywhere on the periodic table? a. chemical characteristics b. physical state c. mass d. reactivity with oxygen

the answer is mass AND CAN BE SEEN IF YOU STUDY PERIODIC TABLE

c. mass  

Explanation:

Chemical elements placed in a tabular form according to their atomic number is known as periodic table.

The elements located next to one another in a periodic table have similar mass. In a period, the mass number of adjacent element varies by very few atomic mass. For example, Potassium and calcium are placed adjacent to each other. Potassium has atomic mass: 39.10 u and calcium has 40.08 u. Similarly, Vanadium has atomic mass 50.94 u and Chromium has atomic mas 52.00 u lie adjacent to each other.