Quiz 1 (Chapter 1 )

What is the lowest energy state of an atom called?

• the ground state

• the excited state

• the solid state

• the chaotic state

*The concept that all moving particles have wave characteristics is attributed to___________.

• de Broglie

• Thomson

• Heisenberg

• Bohr

Which of the following statements expresses Hund's rule?

• Electrons in orbitals must possess opposite spins.

• Single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbitals.

• Electrons with the same spin fill all orbitals.

• P orbitals may contain up to six electrons.

Why does the 4s orbital begin to fill before the 3d orbital?

• The 4s orbital is lower than the 3d orbital in the aufbau diagram

• s orbitals always fill before d orbitals.

• The 4s orbital is to the left of the 3d orbital in the diagram.

• The 4s orbital has higher energy than the 3d orbital.

What is an electron dot structure?

• An element symbol surrounded by its innermost electrons.

• An element symbol surrounded by dots representing its valence electrons.

• An element symbol with a positive charge.

• A filled noble gas in brackets plus the remaining electron configuration expressed by filled orbitals.

Using the figure shown below, how many valence electrons does the atom of this element has?

• 10 electrons

• 8 electrons

• 2 electrons

• none of the above

Niels Bohr’s model of the atom helped to explain _________.

• particles passing through foil

• spectral lines

• the formation of isotopes

• the spectral lines of hydrogen

An electron in energy level n=3 would have_________ compared to an electron in energy level n=6

• Fewer wavelengths

• less energy

• Stronger attraction with the positively charged nucleus

• All of the above

It is impossible to know precisely both the location and velocity of an electron at the same time because of ____________.

• the Pauli exclusion principle

• the dual nature of light

• electrons travel in waves

• the Heisenberg uncertainty principle

What is a quantum?

• another name for an atom

• the smallest amount of energy that can be gained or lost by an atom

• the ground state of an atom

• the excited state of an atom