Problem 16 - Chemistry The Central Science In Si Units

Question

Give the chemical symbol or name for each of the following elements, as appropriate: (a) rhenium, (b) tungsten, \((\mathbf{c})\) caesium, (d) hydrogen, (e) indium, (f) As, \((\mathbf{g})\) Xe, \((\mathbf{h}) \mathrm{Kr},(\mathbf{i})\) Te, (j) Ge.

Step-by-Step Solution

Answer

(a) Re, (b) W, (c) Cs, (d) H, (e) In, (f) Arsenic, (g) Xenon, (h) Krypton, (i) Tellurium, (j) Germanium.

Step 1: Identify the elements

We start by identifying the element and determining if the task is to provide a chemical symbol or a full name. (a) Rhenium (b) Tungsten (c) Caesium (d) Hydrogen (e) Indium (f) As (g) Xe (h) Kr (i) Te (j) Ge

Step 2: Provide Chemical Symbol for Full Names

For elements given by name, we need to provide their chemical symbols: (a) Rhenium - Re (b) Tungsten - W (c) Caesium - Cs (d) Hydrogen - H (e) Indium - In

Step 3: Provide Full Name for Chemical Symbols

For elements given by symbols, provide their full names: (f) As - Arsenic (g) Xe - Xenon (h) Kr - Krypton (i) Te - Tellurium (j) Ge - Germanium

Key Concepts

Element Identification

The process of element identification involves determining whether an elemental name or a symbol is given and then deciphering the corresponding information. Each element is uniquely represented by its name and chemical symbol. This identification process takes place using the periodic table, which lists all known elements, and provides their atomic numbers and other essential data.

An element's chemical symbol is usually a one- or two-letter abbreviation of its name. For example, the symbol for "Rhenium" is "Re" and for "As" is "Arsenic". The goal of element identification is to accurately associate each name with its proper symbol and vice versa, ensuring clear communication in scientific contexts.

Periodic Table

The periodic table is a comprehensive chart that organizes all chemical elements based on their atomic number, electron configurations, and recurring chemical properties. Elements are listed in order of increasing atomic number, which is the number of protons in an element's nucleus.

The layout of the table reflects periodic trends, such as the horizontal rows known as "periods" and the vertical columns called "groups" or "families". Each element displays a wealth of information beyond its symbol and atomic number:

• Atomic weight
• Element category (e.g., metals, non-metals, metalloids)
• Standard state (solid, liquid, or gas)

Understanding this chart is essential for scientists and chemists, as it helps predict the characteristics and behaviors of elements.

Element Names

Element names are scientifically designated titles for each unique element. These names often have historical, geographical, or descriptive origins. For instance, "Tungsten" comes from the Swedish words "tung sten", meaning "heavy stone". The element names can also be derived from people, places, or properties of the element itself.

Here are a few examples:

• "Hydrogen" comes from the Greek words "hydro" (water) and "genes" (creator).
• "Indium" got its name due to the indigo blue line in its spectrum.
• "Caesium" was named after the Latin word for sky blue, "caesius", because of its emission lines.

Names provide an easily recognizable way to communicate about elements, irrespective of language or culture.

Element Symbols

Element symbols are standard one- or two-letter abbreviations derived primarily from the element's name. They allow for easy and universal communication of chemical information. Symbols are often influenced by the element's Latin or Greek name, which is why "Tungsten" is abbreviated as "W" from its older name, 'Wolfram'.

Understanding these symbols is crucial for successfully navigating chemical equations and formulas. Let's consider a few symbols:

• "Xe" stands for Xenon.
• "Te" denotes Tellurium.
• "Ge" is the symbol for Germanium.

Knowing these symbols and their corresponding names enables students and professionals alike to read and write chemical equations accurately, communicating complex information in a simple and efficient manner.