Page 209 - Teacher Preview Copy
P. 209
.
Topic 4: Chemical bonding
22. Electrons in bonding: Determining Number of electrons lost, gained, or shared
1. As sodium reacts with fluorine to form the compound NaF, each sodium atom will
1) Gain 1 electron
3) Lose 1 electron
2) Gain 2 electrons 4) Lose 2 electrons
2. When magnesium reacts with oxygen to form MgO, magnesium atom will
1) Transfer 1 electron to oxygen 3) Share 1 electron with oxygen
2) Transfer 2 electrons to oxygen
4) Share 2 electrons with oxygen
3. What is the total number of pairs of electrons shared in a molecule of N2?
1) One pair 3) Three pairs
2) Two pairs 4) Four Pairs
4. An oxygen molecule contains a double bond because the two atoms of oxygen share a total of
1) 1 electron 3) 3 electrons
4) 4 electrons
2) 2 electrons
Teacher Preview Copy
Teacher Preview Copy
5. The Cl – Cl bond in Cl2 means that the chlorine atoms share
1) 1 pair of electrons 3) 3 pairs of electron
2) 2 pairs of electrons 4) 4 pairs of electrons
6. The total number of electrons shared between the atom of oxygen and the two atoms of hydrogen
of a water molecule is
1) 2 3) 6
2) 4 4) 8
7. Which is true of a lithium atom and a chlorine atom when they react to form LiF?
1) Lithium will lose 1 electron and chlorine will gain 1 electron
2) Lithium will lose 2 electrons and chlorine will gain 2 electron
3) Lithium will gain 1 electron and chlorine will lose 1 electron
4) Lithium will gain 2 electrons and chlorine will lose 2 electrons
8. When potassium atom bonds with oxygen to form the compound K2O,
1) Each oxygen will gain 1 electron from each potassium atom
2) Each oxygen atom will gain 2 electrons from each potassium atom
3) Each oxygen will lose 1 electron to each potassium atom
4) Each oxygen will lose 2electron to each potassium atom
23. Atoms in bonding: Determining number of atoms needed to form a stable configuration:
1. For an atom of oxygen to form a stable configuration during bonding with element beryllium,
it must bond with
1) One beryllium atom
2) Two beryllium atoms 3) Three beryllium atoms
4) Four beryllium atom
2. A barium atom attains a stable electron configuration when it bonds with
1) One chlorine atom 3) One sodium atom
2) Two chlorine atoms 4) Two sodium atom
3. A potassium atom attains a stable electron configuration when it bonds with
1) 1 chlorine atom
3) 3 chlorine atoms
2) 2 chlorine atoms 4) 4 chlorine atoms
4. An atom of nitrogen is most stable when it bonds with
1) One sodium atom 3) One aluminum atom
4) One calcium atom
2) One magnesium atom
5. An atom of fluorine can attain a stable noble gas configuration if it bonds by sharing
1) One electron with a hydrogen atom to form an ionic bond
2) One electron with a hydrogen atom to form a covalent bond
3) Two electrons with a hydrogen atom to form an ionic bond
4) Two electrons with a hydrogen atom to form a covalent bond
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 199
Topic 4: Chemical bonding
22. Electrons in bonding: Determining Number of electrons lost, gained, or shared
1. As sodium reacts with fluorine to form the compound NaF, each sodium atom will
1) Gain 1 electron
3) Lose 1 electron
2) Gain 2 electrons 4) Lose 2 electrons
2. When magnesium reacts with oxygen to form MgO, magnesium atom will
1) Transfer 1 electron to oxygen 3) Share 1 electron with oxygen
2) Transfer 2 electrons to oxygen
4) Share 2 electrons with oxygen
3. What is the total number of pairs of electrons shared in a molecule of N2?
1) One pair 3) Three pairs
2) Two pairs 4) Four Pairs
4. An oxygen molecule contains a double bond because the two atoms of oxygen share a total of
1) 1 electron 3) 3 electrons
4) 4 electrons
2) 2 electrons
Teacher Preview Copy
Teacher Preview Copy
5. The Cl – Cl bond in Cl2 means that the chlorine atoms share
1) 1 pair of electrons 3) 3 pairs of electron
2) 2 pairs of electrons 4) 4 pairs of electrons
6. The total number of electrons shared between the atom of oxygen and the two atoms of hydrogen
of a water molecule is
1) 2 3) 6
2) 4 4) 8
7. Which is true of a lithium atom and a chlorine atom when they react to form LiF?
1) Lithium will lose 1 electron and chlorine will gain 1 electron
2) Lithium will lose 2 electrons and chlorine will gain 2 electron
3) Lithium will gain 1 electron and chlorine will lose 1 electron
4) Lithium will gain 2 electrons and chlorine will lose 2 electrons
8. When potassium atom bonds with oxygen to form the compound K2O,
1) Each oxygen will gain 1 electron from each potassium atom
2) Each oxygen atom will gain 2 electrons from each potassium atom
3) Each oxygen will lose 1 electron to each potassium atom
4) Each oxygen will lose 2electron to each potassium atom
23. Atoms in bonding: Determining number of atoms needed to form a stable configuration:
1. For an atom of oxygen to form a stable configuration during bonding with element beryllium,
it must bond with
1) One beryllium atom
2) Two beryllium atoms 3) Three beryllium atoms
4) Four beryllium atom
2. A barium atom attains a stable electron configuration when it bonds with
1) One chlorine atom 3) One sodium atom
2) Two chlorine atoms 4) Two sodium atom
3. A potassium atom attains a stable electron configuration when it bonds with
1) 1 chlorine atom
3) 3 chlorine atoms
2) 2 chlorine atoms 4) 4 chlorine atoms
4. An atom of nitrogen is most stable when it bonds with
1) One sodium atom 3) One aluminum atom
4) One calcium atom
2) One magnesium atom
5. An atom of fluorine can attain a stable noble gas configuration if it bonds by sharing
1) One electron with a hydrogen atom to form an ionic bond
2) One electron with a hydrogen atom to form a covalent bond
3) Two electrons with a hydrogen atom to form an ionic bond
4) Two electrons with a hydrogen atom to form a covalent bond
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 199
