Question Bank: Journey Inside the Atom

Who proposed the idea of indivisible particles called 'parmanus'?

What was the term used by Democritus to refer to indivisible particles?

Which scientist's atomic theory was based on experimental observations?

What significant particle did J.J. Thomson discover?

What model did Thomson propose to explain the structure of the atom?

Which experiment did Thomson conduct to study cathode rays?

What major concept did the discovery of radiation challenge?

What common misconception did early scientists have about atoms?

Which term describes the positive charge distribution in Thomson's model?

What phenomenon led to the discovery of the electron?

What limitation did early atomic models face?

What did later atomic models shift focus onto after Thomson's work?

What did Acharya Kanada's 'Vaisesika Sutras' contribute to atomic theory?

What was a significant outcome of Thomson's research at the Cavendish Laboratory?

What is the symbol for Gold?

Which of the following elements has a symbol derived from its Greek name?

Which letter convention is NOT correct for element symbols?

How many elements are known today based on our current understanding?

What is the correct symbol for Sodium?

Which element's symbol is formed from the first letter and another letter in its name?

What characteristic of element symbols ensures international standardization?

The symbol for which of the following elements is derived from a German name?

What is the IUPAC standard regarding the first letter of an element symbol?

Who proposed the idea of 'parmanus' as indivisible particles of matter?

Which element is represented by the symbol 'Ag'?

What did the Greek philosophers Leucippus and Democritus call the smallest indivisible particles?

Which of the following is NOT a rule for writing chemical symbols?

Which scientist proposed a theory stating that all matter is composed of indivisible particles called atoms?

What does the symbol 'Zn' represent?

What is the main significance of John Dalton's atomic theory?

Why is using standardized symbols important in science?

Which model of the atom did J.J. Thomson propose?

Which of the following elements has a symbol that consists of only one letter?

What does the 'C' in the element symbol for Carbon signify?

What discovery did J.J. Thomson make regarding cathode rays?

Which element is commonly referred to by the symbol 'Pb'?

What was a significant limitation of early atomic models?

Which term describes the process of atoms emitting radiation?

What defines the difference between atoms of different elements?

What was the first experimental evidence of a subatomic particle?

Thomson’s model is often represented by which fruit analogy?

Which of the following statements is true about J.J. Thomson?

What does the term 'indivisible' refer to in the context of atomic theory?

Which scientific advancement prompted the recognition that atoms are not indivisible?

What particle is primarily responsible for the mass of an atom?

Why do heavier atoms require more neutrons in their nucleus?

Who discovered the neutron, contributing significantly to our understanding of atomic mass?

In a helium atom, why is the mass about four times that of a hydrogen atom despite having only twice the protons?

What is the relative charge of a neutron?

What describes the atomic number of an element?

Which statement is true regarding the mass contribution of electrons?

If an atom has an atomic number of 8, how many protons does it have?

What leads to atomic stability in heavy elements?

Which element has an atomic number of 6?

Why can't protons in the nucleus push each other away significantly?

What does the atomic number determine about an element?

What is the atomic mass number of an atom with 5 protons and 6 neutrons?

An element has atomic number 12. How many electrons does it have in a neutral state?

Which of the following is NOT a component of atomic mass?

Which is the main reason atoms with a higher number of protons also have a higher number of neutrons?

If an atom of an element has 15 protons, what is its atomic number?

What is the atomic number of Sodium?

How does the number of neutrons affect the density of an atom?

What happens if an atom has no neutrons?

How do isotopes of the same element differ?

Identify the atomic number of an element with 8 neutrons and a mass number of 18.

In terms of atomic mass, why are neutrons crucial in heavier elements?

Which of the following pairs of elements would be isotopes?

Which of the following statements is true regarding mass number and atomic number?

An element has an atomic number of 20. How many neutrons does an atom of this element have if its mass number is 40?

Which concept best describes the atomic number?

What would be the atomic number of an element that has 12 protons and 12 electrons in a neutral state?

Why do atoms with a higher atomic number have a greater mass number?

What does it indicate if an atomic number changes for an element?

What concept is explained by the relationship between atomic number and isotopes?

What defines isotopes of an element?

Which of the following isotopes of hydrogen has two neutrons?

How do the chemical properties of isotopes compare?

What is the most abundant isotope of carbon?

Which isotope is commonly used in radiation treatment for cancer?

What is the average atomic mass of chlorine if it has isotopes ³⁵Cl and ³⁷Cl in a 3:1 ratio?

What is the mass number of an atom?

Which statement about isotopes is false?

If an element has 10 protons and 12 neutrons, what is its mass number?

Which of the following isotopes is used to treat goitre?

An atom of chlorine has an atomic number of 17. If it has 18 neutrons, what is its mass number?

Why are isotopes not all identical in weight?

Which of the following statements about isotopes is true?

The unit used to measure atomic mass is called:

Which of the following isotopes of carbon has the greatest mass number?

Which application of isotopes involves determining the age of fossils?

What property distinguishes isobars from isotopes?

The average atomic mass of a chlorine atom is not simply the average of its isotopes because:

Which isotope has the highest mass number among the hydrogen isotopes?

If two elements have the same mass number of 40 but different atomic numbers, what are they called?

Why do isotopes have different physical properties?

What happens to the mass number of an element if a neutron is added?

Which element is commonly used as a nuclear fuel in reactors?

An element has 15 protons and 20 neutrons. What is its atomic number?

Radioactive isotopes are used in medicine primarily because:

Which of the following elements has a mass number of 39 and 19 protons?

An atom with one extra neutron compared to another atom of the same element is classified as:

If an atom has 16 protons and 16 neutrons, what is its mass number?

Which isotope of hydrogen contains the highest number of neutrons?

In terms of structure, how many particles contribute to the mass number?

Two elements have mass numbers of 50 but different atomic numbers. What are they considered?