Elements

All  About Elements

Elements are the simplest and purest forms of matter, consisting of only one type of atom. There are 118 known elements, each with a unique number of protons in its nucleus. The periodic table is a chart that organizes these elements by their properties and atomic structure. Elements can be classified as metals, nonmetals, or metalloids based on their physical and chemical properties. Metals are typically good conductors of heat and electricity and are often malleable and ductile. Nonmetals, on the other hand, are typically poor conductors and are often brittle and non-malleable. Metalloids have properties of both metals and nonmetals. Elements can combine with each other to form compounds, and these compounds can have different properties than the elements that make them up. The study of elements and their properties is called chemistry, and it has helped scientists understand the world around us and develop new technologies and materials.

The Periodic Table of Elements


Ten Stable Elements

1.Calcium (Ca, atomic number 20)


2.Sodium (Na, atomic number 11)


3.Potassium (K, atomic number 19)


4.Magnesium (Mg, atomic number 12)


5.Silicon (Si)






6.Aluminum (Al)


7.Iron (Fe)


  8.Oxygen (O)


9.Titanium (Ti, atomic number 22)


10.Hydrogen (H, atomic number 1)


Ten Unstable Elements 


    1.Technetium (Tc, atomic number 43)




2.Promethium (Pm, atomic number 61)


3.Polonium (Po, atomic number 84)


4.Astatine (At, atomic number 85)


5.Radon (Rn, atomic number 86)


6.Francium (Fr, atomic number 87)


7.Radium (Ra, atomic number 88)


8.Actinium (Ac, atomic number 89)


9.Thorium (Th, atomic number 90)

10.Protactinium (Pa, atomic number 91)


Uses of Elements


Elements Quiz

1.What is the lightest element in the periodic table, with an atomic number of 1?

a. Hydrogen

b. Helium

c. Lithium

d. Beryllium



2.Which element has the highest melting point, making it suitable for use in lightbulb filaments?

a. Tungsten

b. Iron

c. Aluminum

d. Copper


3.Which noble gas is commonly used to fill balloons because it is lighter than air?

a. Helium

b. Neon

c. Argon

d. Krypton

4.What is the most abundant element in the Earth's crust?

a. Oxygen

b. Silicon

c. Aluminum

d. Iron

5.What radioactive element is commonly used in smoke detectors?

a. Uranium

b. Plutonium

c. Radium

d. Americium



6.Which element is known as the "King of Chemicals" due to its wide range of applications and importance in the chemical industry?

a. Chlorine

b. Sodium

c. Hydrogen

d. Carbon

7.Which element has the highest electrical conductivity?

a. Gold

b. Copper

c. Aluminum

d. Silver

8.What is the heaviest naturally occurring element on Earth, with an atomic number of 92?

a. Uranium

b. Plutonium

c. Thorium

d. Radium

9.What element is essential for the proper functioning of thyroid hormones in the human body?

a. Iodine

b. Fluorine

c. Bromine

d. Chlorine


10.Which of the following elements is a liquid at room temperature?

a. Mercury

b. Gallium

c. Indium

d. Thallium


Answers to the Elements Quiz