Covelant Bonding Flashcards
What is a covalent bond?
A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms.
True or False: Covalent bonds typically form between metals and nonmetals.
False
What type of elements primarily form covalent bonds?
Nonmetals
Fill in the blank: In a covalent bond, atoms share _______.
electrons
What is a molecule?
A molecule is a group of atoms bonded together by covalent bonds.
Which of the following is a property of covalent substances? a) High melting point b) Low melting point c) Conduct electricity
b) Low melting point
True or False: Covalent compounds are generally soluble in water.
False
What is the typical state of covalent compounds at room temperature?
Many are gases or liquids, but some are solids.
What is the difference between a single, double, and triple bond?
A single bond involves one pair of shared electrons, a double bond involves two pairs, and a triple bond involves three pairs.
What is an example of a covalent compound?
Water (H2O)
True or False: Covalent compounds can conduct electricity when dissolved in water.
False
What type of bond is formed in a diatomic molecule like O2?
A double bond
Fill in the blank: Covalent bonds are usually _______ compared to ionic bonds.
weaker
What is the term for the ability of a molecule to attract electrons?
Electronegativity
Which element is often the central atom in covalent compounds?
Carbon
What is the VSEPR theory used for?
To predict the shape of molecules based on repulsion between electron pairs.
True or False: Covalent compounds have high boiling points.
False
What is the name of the bond angle in a tetrahedral molecule?
109.5 degrees
What is polarity in terms of covalent bonds?
Polarity refers to the distribution of electrical charge over the atoms in a molecule.
Fill in the blank: A molecule with a positive and negative end is called a _______ molecule.
polar
What is the result of unequal sharing of electrons in a covalent bond?
Polar covalent bond
Which type of covalent bond involves equal sharing of electrons?
Nonpolar covalent bond
What property of covalent compounds makes them good insulators?
Their inability to conduct electricity
What is the general formula for a covalent compound formed between nitrogen and hydrogen?
NH3 (ammonia)
