Chemistry: Octet Rule and Electronegativity

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Why does an ideal contact distance matter for van der Waals interactions?

It allows for the stabilization of hydrogen bonds

Too far a distance will result in no van der Waals interactions (correct)

It enables the fleeting pull of opposite charges between molecules

It prevents the formation of covalent bonds

What type of interaction is the hydrogen bond acceptor involved in?

Van der Waals interactions

Covalent bonding

Hydrogen bonding (correct)

Ionic bonding

What causes water to have a high surface tension and be a good solvent for different chemicals?

Covalent bonding between oxygen and hydrogen

Oxygen's higher electronegativity than hydrogen (correct)

Presence of van der Waals interactions

Partial positive charge on oxygen

What effect do hydrophobic molecules have on the structure of water's hydrogen bonding?

Disrupt its stability (D) Signup and view all the answers

What is the octet rule?

The tendency of atoms to gain, lose, or share electrons to achieve a stable electron configuration with 8 valence electrons (B) Signup and view all the answers

Which type of bond occurs between nonmetals and involves the sharing of electron pairs?

Covalent bond (A) Signup and view all the answers

How are the bases in the DNA double helix held together?

Van der Waals interactions (B) Signup and view all the answers

What characterizes a polar covalent bond?

Development of partial positive and negative charges on different parts of the molecule (C) Signup and view all the answers

What type of atom is an electronegative atom that is covalently bonded to a hydrogen and serves as a hydrogen bond donor?

An electronegative atom such as N, O, C or F (C) Signup and view all the answers

Which type of bond occurs between an electronegative atom and a hydrogen that is covalently bonded to another electronegative atom?

Hydrogen bond (B) Signup and view all the answers

What type of bond occurs between nonmetals and involves the sharing of electron pairs?

Covalent bond (B) Signup and view all the answers

Which type of bond is the strongest and occurs when 2 or more atoms share an electron pair?

Triple bond (C) Signup and view all the answers

What causes partial (-) and (+) charges to develop on different parts of a molecule in a polar covalent bond?

Unequal sharing of electrons (C) Signup and view all the answers

Which type of bond occurs between metals and nonmetals through the transfer of electrons?

Ionic bond (A) Signup and view all the answers

What type of atom serves as a hydrogen bond donor in hydrogen bonds?

Hydrogen (H) (A) Signup and view all the answers

What characteristic defines non polar covalent bonds?

Equally shared electrons (A) Signup and view all the answers

Which type of covalent bond is the weakest with the greatest distance between bonds?

Single bond (A) Signup and view all the answers

What is the net charge in non polar covalent bonds due to equally shared electrons?

+0 (D) Signup and view all the answers

What is the strongest non covalent bond that occurs between metals and nonmetals?

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Which type of atom tends to spend more time close to one atom than the other in a polar covalent bond?