Atomic History and Structure Flashcard

Front

Who was the Greek philosopher who called the smallest particle of matter as 'atom'?

Back

Democritus

Front

What subatomic particles are located in the electron cloud?

Back

Electrons

Front

What does the Bohr model represent?

Back

The Bohr model represents the arrangement of electrons in an atom, specifically for elements like Scandium.

Front

What is the tiny, dense, positively charged portion of the atom that holds most of the atomic mass?

Back

Nucleus

Front

What are subatomic particles with a positive charge?

Back

Protons

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, Electrons

Front

What is the charge of a neutron?

Back

Neutrons have no charge (neutral).

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

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