What is a main group metal in the 6th Period of the Periodic Table of the Elements?
The correct answer and explanation is:
A main group metal in the 6th period of the Periodic Table is Cesium (Cs).
Explanation:
The main group metals are found in the s- and p-blocks of the periodic table. These metals typically have lower electronegativities and are more electropositive. Cesium, a group 1 metal (alkali metal), is a good example of a main group metal in the 6th period.
Cesium is located in the 6th period and belongs to the alkali metal group. Alkali metals are known for their softness, low melting points, and high reactivity, particularly with water. Cesium is the heaviest stable alkali metal, and it is highly reactive, often stored in oil to prevent it from reacting with moisture in the air. Cesium has an atomic number of 55, which places it in the 6th period.
Alkali metals such as Cesium have one electron in their outermost shell, which makes them highly reactive, as they tend to lose this electron easily to achieve a stable electron configuration. This tendency to lose electrons is why Cesium and other alkali metals are strong reducing agents.
Cesium is also used in various industries, such as in the production of atomic clocks. Cesium atomic clocks are some of the most accurate timekeeping devices known. These clocks operate on the principle of measuring the frequency of microwave radiation emitted or absorbed by cesium atoms when they undergo transitions between hyperfine levels.
In summary, Cesium is a main group metal in the 6th period, with notable properties that include high reactivity and importance in scientific and technological applications. Its place as an alkali metal in group 1 reflects its chemical behavior and reactivity.