Problem 15 - Chemistry The Central Science In Si Units

Question

Give the chemical symbol or name for the following elements, as appropriate: (a) helium, (b) platinum, (c) cobalt, (d) \(t\) in, (e) silver, (f) Sb, \((\mathbf{g}) \mathrm{Pb}\), (h) \(\mathrm{Br}\) \(\mathrm{r},(\mathbf{i}) \mathrm{V},(\mathbf{j}) \mathrm{Hg}\).

Step-by-Step Solution

Answer

(a) He, (b) Pt, (c) Co, (d) Sn, (e) Ag, (f) Antimony, (g) Lead, (h) Bromine, (i) Vanadium, (j) Mercury.

Step 1: Identify Each Element

We will identify whether each element name given needs its chemical symbol, or if the chemical symbol given needs to be converted to its element name. This helps us know whether the answer should be a name or a symbol.

Step 2: Element (a) Helium

Helium is a chemical element. The symbol for helium is \( \text{He} \).

Step 3: Element (b) Platinum

Platinum is a chemical element. The symbol for platinum is \( \text{Pt} \).

Step 4: Element (c) Cobalt

Cobalt is a chemical element. The symbol for cobalt is \( \text{Co} \).

Step 5: Element (d) Tin

Tin is a chemical element. The symbol for tin is \( \text{Sn} \).

Step 6: Element (e) Silver

Silver is a chemical element. The symbol for silver is \( \text{Ag} \).

Step 7: Element (f) Sb

The symbol \( \text{Sb} \) stands for the element antimony.

Step 8: Element (g) Pb

The symbol \( \text{Pb} \) stands for the element lead.

Step 9: Element (h) Br

The symbol \( \text{Br} \) stands for the element bromine.

Step 10: Element (i) V

The symbol \( \text{V} \) stands for the element vanadium.

Step 11: Element (j) Hg

The symbol \( \text{Hg} \) stands for the element mercury.

Key Concepts

Periodic Table

The periodic table is a vital tool for understanding chemistry. It is a chart that arranges all known chemical elements in a logical order. Elements are sorted by increasing atomic number, which is the number of protons an atom of that element contains. Each row is called a "period," and each column is known as a "group."

• Periods: These are the horizontal rows in the periodic table. Each period indicates the energy level (or shell number) that the outermost electrons inhabit.
• Groups: The vertical columns. Elements in the same group have similar chemical properties because they have the same number of electrons in their outer shell.

The periodic table not only organizes elements but also predicts their chemical behavior. Understanding this structure helps chemists and students predict how elements might interact with each other in reactions.

Element Names

Element names are often taken from a variety of sources, including Latin, Greek, geographical locations, or even scientists' names. These names are universally recognized in science. Let's look into the origins of some examples from the exercise:

• Helium (He): Comes from the Greek word 'helios' meaning "sun," as it was first observed in the solar spectrum.
• Platinum (Pt): Derived from the Spanish word ‘platina,’ meaning "little silver."
• Tin (Sn): Its name originates from the Anglo-Saxon word for the metal. The chemical symbol comes from the Latin "stannum."

These names provide valuable insight into the history of the element's discovery and its properties.

Chemical Elements

Chemical elements are the basic building blocks of matter. Each has a unique number of protons in its nucleus, giving it distinct properties. Many chemical elements can be found naturally in the Earth's crust. Here are a few more details:

• Antimony (Sb): Known since ancient times, its symbol is from Latin 'stibium.'
• Lead (Pb): Used for thousands of years, comes from the Latin 'plumbum.'
• Mercury (Hg): Known as quicksilver, derived from the Greek word ‘hydrargyrum,’ meaning "liquid silver."

The vast variety of chemical elements allow them to form a wide array of compounds. Understanding these elements is crucial for studying reactions and the composition of different substances.