Atomic Structure Quiz

Who proposed the theory that molecules are formed when atoms share pairs of outer electrons?

• Irving Langmuir

• Gilbert Newton Lewis

• Niels Bohr

• Albert Einstein

What is the maximum number of electrons the outermost level of an atom can hold according to quantum mechanics?

• 18

• 8

• 2

• 4

Tags

NGSS.HS-PS1-1

What type of bond is formed when two atoms share a pair of electrons with each other?

• Hydrogen bond

• Covalent bond

• Ionic bond

• Metallic bond

What is a lone pair?

• A pair of electrons shared between two atoms

• A single unpaired electron

• A pair of electrons located around an atom but not shared with another atom

• Two atoms connected by a covalent bond

According to the octet rule, how many electrons do most atoms strive to acquire in their valence shell?

• 8

• 6

• 4

• 2

What is the shape of a molecule when the central atom is connected to four atoms?

• Linear

• Tetrahedral

• Octahedral

• Trigonal planar

What are resonance structures?

• Structures with different numbers of electrons

• Structures that show atoms in different locations

• Alternate structures showing different arrangements of electrons

• Structures that only depict lone pairs

What is a free radical?

• A stable molecule under normal conditions

• A species in which there is an unpaired electron

• A molecule with all electrons paired

• A molecule that cannot form bonds

What does a double bond consist of?

• Four pairs of shared electrons

• One pair of shared electrons

• Three pairs of shared electrons

• Two pairs of shared electrons

Tags

NGSS.HS-PS1-1

Which element is usually central in a molecule and ends up with an excess number of electrons?

• Nitrogen

• Sulfur

• Carbon

• Oxygen