Chapter 4.3 Modern Atomic Theory

When using Atomic Orbitals, what is the maximum number of electrons in energy level 3?

18

Which statement about electrons and atomic orbitals is NOT true?

An electron has the same amount of energy in all orbitals (even when they have switched energy levels).

An electron configuration is the _____________________________.

Arrangement of electrons in the orbitals of an atom

In the "Models of the Atom" section, whose model is described as a solid without internal structure? (Hint: a nucleus is considered to be an internal structure).

Dalton

In the Electron Cloud Model, the cloud is _________________ where the probability of finding an electron is ___________________.

Denser, High

Which statement accurately represents the arrangement of electrons in Bohr's atomic model?

Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level.

When all the electrons in an atom have the lowest possible energies, the atom is said to be in its

Ground state

In Niels Bohr's model of the atom, electrons move _______________

Like planets orbiting the sun.

The glowing of a neon light is caused by electrons giving off energy as they __________________________

Move from higher to lower energy levels (thereby the electrons are losing energy)

In the electron cloud model, what do scientists use to predict the locations of electrons?

Probability

In the "Models of the Atom" section, whose model has a dense positive nucleus with electrons randomly moving in the space around the nucleus? (Hint: this model does NOT have spherical orbits at fixed distances.)

Rutherford

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

The atom in an excited state has more energy and is less stable than the atom in the ground state

What can you assume when an electron moves to a higher energy level?

The electron has gained energy

A boron atom has two electrons in the first energy level and three electrons in the second energy level. Compare the relative energies of the boron electrons.

The electrons in the second level have the most energy

In the "Models of the Atom" section, whose model is described as a "plum-pudding"? (The plums are negative electrons scattered in the pudding of a sphere with positive charge throughout).

Thomson