The element indicated on the following periodic table is used in smoke detectors. Identify it, give its atomic number, and tell what kind of group it's in.

Key Concepts

Periodic Table

The periodic table is a systematic arrangement of elements based on their atomic number, electron configuration, and recurring chemical properties. Elements are organized into rows (periods) and columns (groups), with each group containing elements that share similar characteristics. Understanding the layout of the periodic table is essential for identifying elements and their properties.

Atomic Number

The atomic number of an element is the number of protons found in the nucleus of its atoms, which determines the element's identity and its position on the periodic table. It also indicates the number of electrons in a neutral atom, influencing the element's chemical behavior. For example, the atomic number of the element used in smoke detectors, which is typically Americium (Am), is 95.

Element Groups

Elements in the periodic table are categorized into groups based on their similar chemical properties. For instance, the group that Americium belongs to is the actinides, which are known for their radioactive properties. Understanding the group classification helps predict the behavior of elements in chemical reactions and their applications, such as in smoke detectors.