Chemistry: Atomic Structure of Sodium

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What is the symbol of a sodium atom?

Sa

So

Si

Na (correct)

What is the atomic number of a sodium atom?

22

26

25

11 (correct)

What is the atomic mass of a sodium atom?

22

27

26

25 (correct)

What is the structure of a sodium atom?

Protons, neutrons, and electrons Signup and view all the answers

What is the name of the Latin name for sodium?

Natrium Signup and view all the answers

What is the phenomenon where electric current passes through gases at very low pressure?

Electric discharge Signup and view all the answers

What happens to the glow of light in the glass tube when a magnet is placed near it during electric discharge?

The position of the glow changes Signup and view all the answers

Who conducted experiments using a modified Geissler's discharge tube to study the nature of gases?

William Crookes Signup and view all the answers

What is the name of the tube used in experiments to study cathode rays?

CRT (Cathode Ray Tube) Signup and view all the answers

What was a major discovery made by studying cathode rays?

Atoms can be divided into smaller particles Signup and view all the answers

Who introduced anode rays using discharge tube experiments?

Tugen Goldstadt Signup and view all the answers

Who is credited with the discovery of X-rays?

Wilhelm Roentgen Signup and view all the answers

What was the significance of Engen Goldstein's experiment with the discharge tube in 1886?

It showed the presence of positive charge in gases Signup and view all the answers

What was the outcome of Wilhelm Roentgen's experiment with the aluminium plate on the path of cathode rays?

The discovery of X-rays Signup and view all the answers

What was JJ Thomson's contribution to the understanding of atoms?

He changed the concepts about the atom Signup and view all the answers

What is the significance of X-rays in modern times?

They are used in medical science, industry, and construction Signup and view all the answers

Who conducted experiments that opposed Thalton's atomic theory?

Engen Goldstein Signup and view all the answers

What is the main difference between protons and neutrons?

Protons have a positive charge, while neutrons have no charge Signup and view all the answers

What is the term for the model of the atom proposed by Rutherford?

The Planetary Model of Atom Signup and view all the answers

What is the reason why an atom is electrically neutral?

Because it has an equal number of protons and electrons Signup and view all the answers

What are the three main particles that make up an atom?

Protons, Neutrons, and Electrons Signup and view all the answers

What is the term for the central part of an atom where protons and neutrons are found?

Nucleus Signup and view all the answers

Who is credited with discovering the neutron?

James Chadwick Signup and view all the answers

What is the name of the disease that John Dalton suffered from?

Sous disease Signup and view all the answers

What is the smallest unit of matter that can take part in chemical reactions?

Atom Signup and view all the answers

What is the main characteristic of atoms of the same element?

They are identical in properties and masses Signup and view all the answers

What is the year in which John Dalton proposed the atomic theory?

1807 Signup and view all the answers

What is the result of the combination of two or more elements in a simple ratio?

Compound Signup and view all the answers

What is the main limitation of Dalton's atomic theory?

It was not supported by experimental observations Signup and view all the answers

What is the term used to describe the smallest particles that make up matter?

Awes Signup and view all the answers

What is the main idea behind Dalton's atomic theory?

Matter is made up of minute particles called awes Signup and view all the answers