Question

7
the periodic table includes all of the known elements in the world. how are elements arranged on the periodic table?
a. by their atomic number
b. by the elements name
c. by their atomic mass
d. by the number of neutrons found in the element
reset submit

Explanation:

The modern periodic table organizes elements in order of increasing atomic number (number of protons in the nucleus), which determines an element's chemical properties and ensures consistent periodic trends. Earlier tables used atomic mass, but atomic number is the current standard.

Answer:

A. by their atomic number