P8 Honors Chemistry Ch. 3 & 4

Front

What is the number of neutrons in Potassium-39?

Back

Potassium-39 has 20 neutrons.

Front

What is the difference between excited states and ground state of an electron in an atom?

Back

There are many different excited states for an electron in an atom, but only one ground state.

Front

What is the name of the isotope with 63 as its mass number?

Back

Copper-63.

Front

What are the two natures of light?

Back

The two natures of light are particle and wave.

Front

How do you calculate the number of moles from grams?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of lithium?

Back

The molar mass of lithium is approximately 6.94 g/mol.

Front

Define isotope.

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the significance of the ground state in an atom?

Back

The ground state is the lowest energy state of an atom, where electrons are in the closest orbitals to the nucleus.

Front

Explain the concept of electron configuration.

Back

Electron configuration describes the distribution of electrons in an atom's orbitals.

Front

What is the principle behind the photoelectric effect?

Back

The photoelectric effect demonstrates that light can behave as a particle, causing electrons to be emitted from a material.