Question

State :-

a)Avogadro's Law.

b) Periodic Law.​

Answer 1

Answer:

${\huge{\textbf{\textsf{{\color{navy}{♡ An}}{\purple{sw}}{\pink{er ♡}}}}}}$

Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules."

a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties.

Answer 2

$\huge\underline\mathfrak{\star Answer:-}$

$\large\underline\mathtt\pink{a)\: Avogadro's\: Law:-}$

➢ Avogadro’s law, also known as Avogadro’s principle or Avogadro’s hypothesis, is a gas law which states that the total number of atoms/molecules of a gas (i.e. the amount of gaseous substance) is directly proportional to the volume occupied by the gas at constant temperature and pressure.

➝Formulation and Graphical Representation:-

➢At constant pressure and temperature, Avogadro’s law can be expressed via the following formula:

V ∝ n

V ∝ nV/n = k

Where V is the volume of the gas, n denotes the amount of gaseous substance (often expressed in moles), and k is a constant. When the amount of gaseous substance is increased, the corresponding increase in the volume occupied by the gas can be calculated with the help of the following formula:

$V_1/n_1 = V_2/n_2$( = k, as per Avogadro’s law).

➢The graphical representation of Avogadro’s law (with the amount of substance on the X-axis and volume on the Y-axis) is illustrated below.

➢Here,(refer to the attachment) the straight line (which indicates that the two quantities are directly proportional) passes through the origin, implying that zero moles of gas will occupy zero volume.

______________________________________

$\large\underline\mathtt\pink{b)\: Periodic\:Law:-}$

➝The modern Periodic law can be stated as:

➢“The physical and chemical properties of the elements are periodic functions of their atomic numbers”.

➢The modern periodic table is developed after the periodic law and a periodic table given by Mendeleev. In the latter part of the 18th century, Mendeleev made his periodic table. Scientists did not know about the internal structure of the atom back then.

➢The development of various atomic models and advances in quantum theory revealed that the atomic number is the most basic property of a chemical element. This led to the modification of Mendeleev’s periodic law, which is today called as modern periodic law.

________________________________