Question

Which of the following is a common pattern found on the periodic table?

a) Increasing atomic number from left to right
b) Decreasing atomic number from left to right
c) Elements grouped by their melting points
d) Elements sorted by their number of protons

Answer 1

The common pattern found on the periodic table is the increasing atomic number from left to right, meaning elements are arranged based on their number of protons, and exhibit periodic trends.

Step-by-step explanation:

Among the options provided, the common pattern found on the periodic table is a) Increasing atomic number from left to right. This means that as one moves horizontally across the periodic table, each element will have one more proton than the element before it. The periodic table also arranges elements in groups and periods, where elements in the same group (vertical columns) have similar chemical properties and elements in the same period (horizontal rows) have an increasing number of protons and electrons. Additionally, the periodic trends such as atomic size and metallic character typically increase from right to left in a row and from top to bottom in a column, whereas ionization energy and electronegativity tend to increase from left to right in a row and from bottom to top in a column.