Atomic History and Structure Flashcard

Front

What did JJ Thomson discover about the structure of the atom?

Back

He provided evidence that an atom contains negatively charged particles (electrons).

Front

How many protons are present in the element nitrogen?

Back

7 protons.

Front

What is the number of neutrons in the isotope of nitrogen with a mass number of 23?

Back

16 neutrons.

Front

What are the subatomic particles that have a positive charge?

Back

Protons.

Front

Who created the Planetary Model of the atom?

Back

Niels Bohr.

Front

What is the charge of an electron?

Back

Negatively charged.

Front

What is the charge of a proton?

Back

Positively charged.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus and contribute to the mass of the atom.