Which of the following best describes the properties of the elements?
A) Chemical and physical properties vary in a systematic way as one moves across a row of the periodic table.
B) Chemical and physical properties vary in a systematic way as one moves down a column of the periodic table.
C) both a and b
D) neither a nor b

Question

Quizplus · Accepted Answer

The periodic table is arranged in such a way that elements are grouped together based on their chemical and physical properties. As one moves across a row from left to right, there is a gradual increase in the number of protons and electrons, which leads to a gradual change in the properties of the elements. This is known as the periodic law. Similarly, as one moves down a column, the properties of the elements also change in a systematic manner due to the increase in the number of energy levels. Therefore, both statements in options A and B are correct.

Which of the Following Best Describes the Properties of the Elements