Structure and bonding Flashcards
What is the basic unit of a covalent bond?
A pair of electrons shared between two atoms.
True or False: Ionic bonds involve the transfer of electrons.
True.
Fill in the blank: A substance that conducts electricity when dissolved in water is called a __________.
electrolyte.
What type of structure do ionic compounds form?
A crystalline lattice structure.
What are the two main types of bonding?
Ionic bonding and covalent bonding.
Which type of bond is typically formed between metals and non-metals?
Ionic bond.
What is meant by the term ‘electronegativity’?
The ability of an atom to attract electrons in a bond.
Multiple Choice: Which of the following is a characteristic of covalent compounds? A) High melting points B) Conduct electricity C) Low melting points
C) Low melting points.
What is a molecule?
A group of two or more atoms bonded together.
True or False: All ionic compounds are soluble in water.
False.
What determines the shape of a molecule?
The arrangement of its bonds and lone pairs of electrons.
Fill in the blank: The type of bond formed between two non-metals is called a __________ bond.
covalent.
What is a polar covalent bond?
A covalent bond with unequal sharing of electrons.
Multiple Choice: Which of the following compounds is ionic? A) H2O B) NaCl C) CO2
B) NaCl.
What happens to the electrons in a metallic bond?
They are delocalized and shared among many atoms.
True or False: Ionic compounds typically have high melting and boiling points.
True.
What is an alloy?
A mixture of two or more elements, at least one of which is a metal.
Fill in the blank: The force of attraction between oppositely charged ions is known as __________.
ionic bonding.
What is the VSEPR theory used for?
To predict the shape of molecules based on electron pair repulsion.
What type of bond is formed between atoms of the same element?
A nonpolar covalent bond.
Multiple Choice: Which type of structure do metals have? A) Molecular B) Lattice C) Network
B) Lattice.
What is a lone pair?
A pair of valence electrons that are not shared with another atom.
True or False: Covalent bonds can form between atoms of different elements.
True.
What influences the strength of a covalent bond?
The amount of shared electron pairs and the distance between the nuclei.
Fill in the blank: The chemical formula for table salt is __________.
NaCl.
What is a diatomic molecule?
A molecule that consists of two atoms of the same or different elements.
