Understanding Atomic Structure and Electrons

What is the term used to describe the lowest energy state of an atom or molecule?

• Excited state

• Ground state

• Valence state

• Ionized state

Which of the following describes a region in an atom where there is a high probability of finding electrons?

• Atomic nucleus

• Atomic orbital

• Energy sublevel

• Principal energy level

What is the principal energy level of an electron in an atom?

• The specific energy sublevel an electron occupies

• The main energy level or shell an electron occupies

• The number of valence electrons

• The shape of the atomic orbital

Which of the following is a subdivision of a principal energy level?

• Atomic orbital

• Valence electron

• Energy sublevel

• Electron dot structure

What are valence electrons?

• Electrons in the innermost shell

• Electrons in the outermost shell

• Electrons that have been excited to a higher energy level

• Electrons that are shared between atoms

Which of the following represents the electron dot structure for an element?

• A diagram showing the atomic nucleus and all electrons

• A diagram showing only the valence electrons as dots around the element symbol

• A diagram showing the energy levels and sublevels

• A diagram showing the atomic orbitals

How many electrons can a single atomic orbital hold?

• 1

• 2

• 4

• 6

Which of the following statements is true about energy sublevels?

• They are the same as atomic orbitals

• They are divided into s, p, d, and f sublevels

• They can hold an unlimited number of electrons

• They are the same as principal energy levels

What is the maximum number of electrons that can occupy the third principal energy level?

• 8

• 18

• 32

• 10

Which of the following is NOT a characteristic of valence electrons?

• They determine the chemical properties of an element

• They are involved in forming chemical bonds

• They are found in the innermost energy level

• They can be represented in an electron dot structure