Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds with other atoms.

Front

How many valence electrons does a fluorine atom have?

Back

7

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

If the atomic number of an element is 15, how many valence and core electrons does it have?

Back

5 valence electrons and 10 core electrons.

Front

What is the quantum mechanical model of the atom?

Back

The quantum mechanical model describes the probable location of electrons in atomic orbitals, rather than fixed paths.

Front

How many energy levels does a hydrogen atom have if it emits red, blue-green, blue, and violet light?

Back

5 energy levels in the visible region of the spectrum.

Front

What is the Bohr model of the atom?

Back

The Bohr model depicts electrons orbiting the nucleus in fixed paths or energy levels.

Front

How many electrons are in the outermost orbit of a boron atom according to the Bohr model?

Back

3 electrons.

Front

What is the difference between core electrons and valence electrons?

Back

Core electrons are those in the inner shells, while valence electrons are in the outermost shell and participate in bonding.

Front

What is an atomic orbital?

Back

An atomic orbital is a region in an atom where there is a high probability of finding electrons.