Question

In the modern periodic table, elements are arranged by increasing atomic number (number of protons). Each row on the table is a ________. Each column is a ________.

a) phase / classification
b) category / class
c) period / group
d) block / order

Answer 1

The modern periodic table of elements arranges the elements according to the increasing order of the atomic number. Each row on the table is a period and each column is a group.

Step-by-step explanation:

The modern periodic table of elements arranges the elements according to the increasing order of the atomic number. Each row on the table is a period and each column is a group.