In this worksheet, we will practice using the group of a nonmetal in the periodic table to calculate the maximum number of covalent bonds it may form.
Hydrogen has a single electron in its valence shell. How many covalent bonds can it form?
The valence shell of oxygen is the second electron shell and contains 6 electrons. How many covalent bonds can oxygen form?
The valence shell of carbon is the second electron shell and contains 4 electrons. How many covalent bonds can carbon form?
Which of the following pairs of atoms are unlikely to form a covalent bond?
- ANeon and argon
- BNitrogen and oxygen
- CSulfur and chlorine
- DCarbon and fluorine
- EBoron and hydrogen
Which of the following statements about chemical bonding is false?
- AIn covalent bonding, electrons are shared between atoms.
- BMolecular compounds can only contain covalent or ionic bonding, never both.
- CIn ionic bonding, electrons are transferred between atoms, forming ions.
- DChemical bonding involves electrostatic attractions between oppositely charged particles.
- EIn metallic bonding, a sea of delocalized electrons is formed.
How many electrons does an atom of strontium lose when forming the ionic compound ?
How many atoms of bromine are usually needed to form an ionic compound with a single atom of aluminum?
The Lewis structure for a molecular compound of potassium and sulfur is shown below. How can you tell this compound is ionically bonded?
- AIonic compounds always contain atoms in a ratio.
- BThe atoms are sharing electrons to obtain full outer shells but have not become ions.
- CSulfur atoms can only form ionic bonds.
- DThe atoms have either lost or gained electrons to become ions and obtain full outer shells.
- EThe atoms are surrounded by a sea of delocalized electrons.
Which of the following is the correct Lewis structure for a fluoride ion?
The Lewis structure for an atom of helium is shown below. Which of these statements explains why helium does not usually form chemical bonds?
- AThe first electron shell can hold eight electrons, but finding six electrons for a full valence shell is too difficult.
- BHelium is too small to form chemical bonds with atoms of other elements.
- CThe first electron shell can only hold two electrons; therefore, helium has a full valence shell.
- DHelium is a gas and therefore cannot lose its two electrons.
- EHelium changes into hydrogen when it loses one of its electrons.
Which of the following is the correct Lewis structure for an atom of nitrogen?
Like hydrogen atoms, atoms of sodium each contain a single valence electron. Which of the following is the best description of bonding between sodium atoms?
- AThe valence electrons of sodium are delocalized, producing a lattice stabilized by metallic bonding.
- BThe valence electrons of sodium atoms are not involved in bonding.
- CThe valence electrons of sodium atoms are shared, producing diatomic molecules with single covalent bonds.
- DThe valence electrons of sodium atoms are shared, producing diatomic molecules with double covalent bonds.
- EThe valence electrons of sodium are removed, producing a lattice stabilized by ionic bonding.
Which type of chemical bonding does not involve electrostatic attraction between the positively charged nuclei and the negatively charged electrons?
Which of the following is not a type of chemical bonding?
Which of the following pairs of atoms are unlikely to form an ionic compound?
- ACalcium and oxygen
- BLithium and sulfur
- CMagnesium and chlorine
- DGallium and fluorine
- ESodium and aluminum