Class 9 Science Chapter 1: Atomic Structure Quiz

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9 Questions

What is the smallest particle of an element that retains the properties of that element?


What is the total number of protons and neutrons in the nucleus of an atom called?

Nucleon number

Which subatomic particle has a positive charge?


Explain the concept of an atomic number and its significance in determining the identity of an element.

The atomic number of an element is the number of protons in the nucleus of an atom. It is crucial in identifying the specific element, as each element has a unique atomic number.

Discuss the role of electrons in determining the chemical behavior of an element.

Electrons are involved in chemical reactions and bonding. The number of electrons in the outer shell determines the element's chemical behavior and reactivity.

Describe the differences between an atom and an ion, and provide an example of an ion.

An atom is electrically neutral, while an ion has a net positive or negative charge. An example of an ion is the chloride ion (Cl-), formed when a chlorine atom gains an electron.

What is the difference between an atom and an isotope?

An atom is a basic unit of matter, while an isotope is a variant of an element with the same number of protons but a different number of neutrons.

Explain the significance of the periodic table in understanding the properties of elements.

The periodic table organizes elements based on their atomic number and properties, allowing for easy identification of trends and relationships between elements.

How does the electron configuration of an atom contribute to its chemical reactivity?

The arrangement of electrons in the electron shells determines the stability and reactivity of an atom by influencing its ability to form chemical bonds.

Test your knowledge of atomic structure with this quiz. Answer questions about subatomic particles, atomic properties, and atomic nuclei.

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