Atomic Model and Elements

Front

Which element has 13 electrons?

Back

Aluminum

Front

What determines the properties of elements?

Back

Atomic number

Front

What is the average atomic mass of Magnesium?

Back

24.305

Front

Who proposed that electrons have specific amounts of energy and move in specific orbits around the nucleus?

Back

Niels Bohr

Front

What does the term 'atomos' mean?

Back

Unable to be divided

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the atomic mass unit (amu)?

Back

It is a standard unit of mass that quantifies mass on an atomic or molecular scale.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average of an element's isotopes, while mass number is the total number of protons and neutrons in an atom.

Front

What is the role of neutrons in an atom?

Back

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

Front

What is the electron configuration of Aluminum?

Back

1s² 2s² 2p⁶ 3s² 3p¹