A. What is the group number and name of the group that...

a. What is the group number and name of the group that contains potassium? b. Is potassium a metal, a nonmetal, or a metalloid? c. How many protons are in an atom of potassium? A mineral deficiency of potassium causes brown spots on potato leaves. d. Potassium has three naturally occurring isotopes. They are $\mathrm{K}-39, \mathrm{~K}-40$, and $\mathrm{K}-41$. Using the atomic mass of potassium, determine which isotope of potassium is the most abundant.

a. What is the group number and name of the group that contains potassium?
b. Is potassium a metal, a nonmetal, or a metalloid?
c. How many protons are in an atom of potassium?
A mineral deficiency of potassium causes brown spots on potato leaves.
d. Potassium has three naturally occurring isotopes. They are $\mathrm{K}-39, \mathrm{~K}-40$, and $\mathrm{K}-41$. Using the atomic mass of potassium, determine which isotope of potassium is the most abundant.

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Key Concepts

Periodic Table Groups

Periodic table groups organize elements based on similar chemical properties. Each group has a specific group number and a common name, such as the alkali metals group, which is Group 1. Knowledge of groups helps in predicting element behavior, reactivity trends, and electron configurations.

Element Classification

Element classification distinguishes between metals, nonmetals, and metalloids based on their physical and chemical properties. This classification affects their reactivity, conductivity, and other characteristic behaviors. Understanding this helps in identifying an element's general behavior in chemical reactions.

Atomic Structure

Atomic structure is concerned with the arrangement of subatomic particles within an atom, including protons, neutrons, and electrons. The number of protons, which equals the atomic number, defines the identity of an element and determines its position in the periodic table.

Isotopic Abundance

Isotopic abundance refers to the relative amounts of different isotopes of an element present in nature. These isotopes have the same number of protons but different numbers of neutrons. Analyzing atomic mass data can provide insight into which isotope is most prevalent, a key concept in understanding atomic mass calculations and natural element composition.

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