Explanation:
Molecular formula
Molecular formula is used to represent exact no. of different atoms present in a molecule. For example, molecular formula of glucose is
. That means one molecule of glucose has 6 molecules of C, 12 molecules of hydrogen and 6 molecules of oxyhen.
Structural formula
Graphic structure of a compound is represented by a structural formula. Bonding present between atoms are also shown. Structural formula of ethyl alcohol is shown in the attachment
Electron dot formula
Electron dot structure are used to represent possible structure of the compound along with bonding electrons and lone pair electrons. It is also known as Lewis dot structure. Electron dot structure of methane is shown in the attachment.
- Symbol of the ion: Br⁻.
- Name of the ion: Bromide ion.
<h3>Explanation</h3>
Br is the symbol for the element bromine. It is found in new IUPAC group 17 of a modern periodic table. Bromine is a halogen.
To name a halogen anion with charge -1, replace the suffix "-ine" in the name of the element with the suffix "-ide." For example,
![\displaystyle \begin{array}{lcl} \text{Element}& & \text{Ion}\\ \text{Brom}\textbf{ine} &\to& \text{Brom}\textbf{ide}\text{ ion} \\\text{Chlor}\textbf{ine} &\to & \text{Chlor}\textbf{ide}\text{ ion}\\\text{Fluor}\textbf{ide}& \to & \text{Fluor}\textbf{ide}\text{ ion}\end{array}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cbegin%7Barray%7D%7Blcl%7D%20%5Ctext%7BElement%7D%26%20%26%20%5Ctext%7BIon%7D%5C%5C%20%5Ctext%7BBrom%7D%5Ctextbf%7Bine%7D%20%26%5Cto%26%20%5Ctext%7BBrom%7D%5Ctextbf%7Bide%7D%5Ctext%7B%20ion%7D%20%5C%5C%5Ctext%7BChlor%7D%5Ctextbf%7Bine%7D%20%26%5Cto%20%26%20%5Ctext%7BChlor%7D%5Ctextbf%7Bide%7D%5Ctext%7B%20ion%7D%5C%5C%5Ctext%7BFluor%7D%5Ctextbf%7Bide%7D%26%20%5Cto%20%26%20%5Ctext%7BFluor%7D%5Ctextbf%7Bide%7D%5Ctext%7B%20ion%7D%5Cend%7Barray%7D)
The symbol of a bromine atom is Br. The atom is neutral. However, it carries a negative charge of -1 after it gains one electrons and forms a negative ion. The charge of the bromide ion shall be written as a superscript in its symbol. The size of the charge is written in front of the sign.
The charge on the bromide ion is -1. In the superscript, omit the number 1 and write "-". Hence the symbol
.
Answer:
f = 1.87 × 10¹⁹ s⁻¹
Explanation:
Given data:
Wavelength of light = 1.6 ×10⁻¹¹ m
Frequency of light = ?
Solution:
Formula:
speed of light = wavelength × frequency
Frequency = speed of light / wavelength
speed of light = 3× 10⁸ m/s
Now we will put the values in formula:
Frequency = speed of light / wavelength
f = 3× 10⁸ m/s / 1.6 ×10⁻¹¹ m
f = 1.87 × 10¹⁹ s⁻¹