Transcript Answer - luvidinha

Bonding (Ionic, Covalent,
Metallic), Formulas
Warmups
1.
Hydrogen bonding is a type of-
A) Strong covalent bonds
B) Weak ionic bonds
C) Strong intermolecular force
D) Weak intermolecular force
Answer
C is the correct answer.
2. Which element forms an ionic compound
when it reacts with lithium?
A) K
B) Fe
C) Kr
D) Br
Answer
D is the correct answer.
3. Given the formula representing a molecule:
H–C≡C–H
The molecule is –
A) symmetrical and polar
B) symmetrical and nonpolar
C) asymmetrical and polar
D) asymmetrical and nonpolar
Answer
B is the correct answer.
4. Which compound has both ionic and covalent
bonds?
A) CO2
B) CH3OH
C) NaI
D) Na2CO3
Answer
D is the correct answer.
5. An atom of which element has the greatest
attraction for electrons in a chemical bond?
A) As
B) Ga
C) Ge
D) Se
Answer
D is the correct answer.
6. Which formula represents a polar molecule?
A) H2
B) H2O
C) CO2
D) CCl4
Answer
B is the correct answer.
7. Which type of bond is found between atoms
of solid cobalt?
A) nonpolar covalent
B) polar covalent
C) metallic
D) ionic
Answer
C is the correct answer.
8. The bond between which two atoms is most
polar?
A) Br and Cl
B) Br and F
C) I and Cl
D) I and F
Answer
D is the correct answer.
9. Every water molecule has two hydrogen atoms
bonded to one oxygen atom. This fact supports the
concept that elements in a compound are –
A) chemically combined in a fixed proportion
B) chemically combined in proportions that vary
C) physically mixed in a fixed proportion
D) physically mixed in proportions that vary
Answer
A is the correct answer.
10. What is the total number of electrons shared
in a double covalent bond?
A) 1
B) 2
C) 3
D) 4
Answer
D is the correct answer.
11. What is the total number of electron pairs
shared between the two atoms in an O2
molecule?
A) 1
B) 2
C) 4
D) 6
Answer
B is the correct answer.
12. The two forms of oxygen, O2 (g) and O3 (g), have –
A) different molecular structures and identical
properties
B) different molecular structures and different
properties
C) identical molecular structures and identical
properties
D) identical molecular structures and different
properties
Answer
A is the correct answer.
13. Which atoms can bond with each other to
form chains, rings, or networks?
A) carbon atoms
B) hydrogen atoms
C) oxygen atoms
D) nitrogen atoms
Answer
A is the correct answer.
14. Which atom has the weakest attraction for
the electrons in a bond with an H atom?
A) Cl atom
B) F atom
C) O atom
D) S atom
Answer
D is the correct answer.
15. At STP, both diamond and graphite are solids
composed of carbon atoms. These solids have –
A) the same crystal structure and the same properties
B) the same crystal structure and different properties
C) different crystal structures and the same properties
D) different crystal structures and different properties
Answer
D is the correct answer.
16. Which element, represented by X, reacts with
fluorine to produce the compound XF2?
A) aluminum
B) argon
C) magnesium
D) sodium
Answer
C is the correct answer.
17. Which formula represents copper (I) oxide?
A) CuO
B) CuO2
C) Cu2O
D) Cu2O2
Answer
C is the correct answer.
18. Which element forms a compound with
chlorine with the general formula MCl?
A) Rb
B) Ra
C) Re
D) Rn
Answer
A is the correct answer.
19. The compound formed between element X and
oxygen has the chemical formula X2O. Which
element would X most likely represent?
A)
Fe
B) Zn
C) Ag
D)
Sn
Answer
C is the correct answer.