The Nucleus

Front

What is the nucleus?

Back

The nucleus is the central part of an atom, containing protons and neutrons, and is responsible for the atom's mass and positive charge.

Front

Who proposed the atomic theory in 1905?

Back

Albert Einstein mathematically proved the existence of atoms and molecules in 1905.

Front

What is the mass number of an atom?

Back

The mass number is the total number of nucleons (protons and neutrons) in the nucleus of an atom.

Front

What does the term 'relative atomic mass' refer to?

Back

Relative atomic mass is the weighted average of the masses of an element's isotopes, taking into account their natural abundance.

Front

What is Brownian motion?

Back

Brownian motion is the random motion of particles suspended in a fluid, named after botanist Robert Brown.

Front

What is the difference between atomic number and mass number?

Back

The atomic number is the number of protons in the nucleus, while the mass number is the total number of protons and neutrons.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number and identity of an element, contributing to its chemical properties.

Front

What is the role of neutrons in the nucleus?

Back

Neutrons contribute to the mass of the nucleus and help stabilize it by offsetting the repulsive forces between protons.

Front

What is atomic weight?

Back

Atomic weight is the average mass of an element's atoms, measured in atomic mass units (amu), reflecting the relative abundance of isotopes.

Front

What is the original Latin name for silver?

Back

Argentum is the original Latin name for silver, which means 'shiny gray stuff'.