28. what holds ions together in an ionic bond?
a. neutron attraction
b. electron sharing
c. opposite charges
d. nuclear force

29. which bond shares electrons equally?
a. polar covalent
b. nonpolar covalent
c. ionic
d. hydrogen

30. which bond shares electrons unequally?
a. ionic
b. polar covalent
c. metallic
d. hydrogen

31. which compound is ionic?
a. co₂
b. h₂o
c. nacl
d. o₂

32. which compound is covalent?
a. mgo
b. cacl₂
c. co₂
d. naf

33. how many fluorine atoms are in baf₂?
a. 1
b. 2
c. 3
d. 4

34. which element forms 4 covalent bonds?
a. hydrogen
b. carbon
c. oxygen
d. nitrogen

35. which element forms 2 covalent bonds?
a. hydrogen
b. carbon
c. oxygen
d. nitrogen

36. which bond is the weakest attraction between molecules?
a. ionic
b. covalent
c. metallic
d. hydrogen

37. what is the charge on an ion with 13 protons and 10 electrons?
a. -3
b. -1
c. +1
d. +3

38. which formula correctly balances aluminum and oxygen?
a. alo
b. al₂o₃
c. al₃o₂
d. alo₂

39. which is the correct formula for silver oxide?
a. ago
b. ag₂o
c. ago₂
d. ag₂o₂

40. which compound would conduct electricity when dissolved in water?
a. co₂
b. o₂
c. nacl
d. h₂o

41. which bond forms between water molecules?
a. ionic
b. hydrogen
c. metallic
d. nuclear

42. which ion has a negative charge?
a. proton
b. neutron
c. anion
d. cation

Question

28. what holds ions together in an ionic bond?
a. neutron attraction
b. electron sharing
c. opposite charges
d. nuclear force

29. which bond shares electrons equally?
a. polar covalent
b. nonpolar covalent
c. ionic
d. hydrogen

30. which bond shares electrons unequally?
a. ionic
b. polar covalent
c. metallic
d. hydrogen

31. which compound is ionic?
a. co₂
b. h₂o
c. nacl
d. o₂

32. which compound is covalent?
a. mgo
b. cacl₂
c. co₂
d. naf

33. how many fluorine atoms are in baf₂?
a. 1
b. 2
c. 3
d. 4

34. which element forms 4 covalent bonds?
a. hydrogen
b. carbon
c. oxygen
d. nitrogen

35. which element forms 2 covalent bonds?
a. hydrogen
b. carbon
c. oxygen
d. nitrogen

36. which bond is the weakest attraction between molecules?
a. ionic
b. covalent
c. metallic
d. hydrogen

37. what is the charge on an ion with 13 protons and 10 electrons?
a. -3
b. -1
c. +1
d. +3

38. which formula correctly balances aluminum and oxygen?
a. alo
b. al₂o₃
c. al₃o₂
d. alo₂

39. which is the correct formula for silver oxide?
a. ago
b. ag₂o
c. ago₂
d. ag₂o₂

40. which compound would conduct electricity when dissolved in water?
a. co₂
b. o₂
c. nacl
d. h₂o

41. which bond forms between water molecules?
a. ionic
b. hydrogen
c. metallic
d. nuclear

42. which ion has a negative charge?
a. proton
b. neutron
c. anion
d. cation

Accepted Answer

### Question 28
# Brief Explanations:
Ionic bonds form between ions of opposite charges (cations and anions). Neutron attraction is not a bonding force, electron sharing is covalent, and nuclear force is for atomic nuclei. So opposite charges hold ions in an ionic bond.
# Answer:
C. Opposite charges

### Question 29
# Brief Explanations:
Nonpolar covalent bonds share electrons equally due to equal electronegativity between atoms. Polar covalent shares unequally, ionic transfers electrons, and hydrogen is an intermolecular force (or a special bond in some cases but not equal sharing).
# Answer:
B. Nonpolar covalent

### Question 30
# Brief Explanations:
Polar covalent bonds occur when there's a difference in electronegativity between atoms, leading to unequal sharing of electrons. Ionic transfers, metallic is delocalized, and hydrogen is intermolecular (or special bond) not unequal sharing in the same way.
# Answer:
B. Polar covalent

### Question 31
# Brief Explanations:
Ionic compounds are formed between metals and nonmetals (or polyatomic ions). NaCl is sodium (metal) and chlorine (nonmetal). CO₂, H₂O are covalent (nonmetal - nonmetal), and O₂ is elemental.
# Answer:
C. NaCl

### Question 32
# Brief Explanations:
Covalent compounds are between nonmetals. CO₂ is carbon (nonmetal) and oxygen (nonmetal). MgO, CaCl₂, NaF are ionic (metal - nonmetal).
# Answer:
C. CO₂

### Question 33
# Brief Explanations:
In the formula $ \text{BaF}_2 $, the subscript after F is 2, so there are 2 fluorine atoms.
# Answer:
B. 2

### Question 34
# Brief Explanations:
Carbon has 4 valence electrons and typically forms 4 covalent bonds (e.g., in CH₄). Hydrogen forms 1, oxygen forms 2 (usually), nitrogen forms 3 (usually).
# Answer:
B. Carbon

### Question 35
# Brief Explanations:
Oxygen has 6 valence electrons and typically forms 2 covalent bonds (e.g., in H₂O). Hydrogen forms 1, carbon forms 4, nitrogen forms 3.
# Answer:
C. Oxygen

### Question 36
# Brief Explanations:
Hydrogen bonds are intermolecular forces (weakest among the options here). Ionic, covalent, and metallic bonds are intramolecular (stronger). Ionic bonds are strong electrostatic attractions, covalent are shared electrons (strong), metallic are delocalized electrons (strong).
# Answer:
D. Hydrogen

### Question 37
# Brief Explanations:
Charge = protons - electrons = 13 - 10 = +3.
# Answer:
D. +3

### Question 38
# Brief Explanations:
Aluminum has a +3 charge, oxygen has a -2 charge. To balance, we need 2 Al (2×+3 = +6) and 3 O (3×-2 = -6), so $ \text{Al}_2\text{O}_3 $.
# Answer:
B. $ \text{Al}_2\text{O}_3 $

### Question 39
# Brief Explanations:
Silver (Ag) has a +1 charge, oxygen (O) has a -2 charge. To balance, we need 2 Ag (+1×2 = +2) and 1 O (-2), so $ \text{Ag}_2\text{O} $.
# Answer:
B. $ \text{Ag}_2\text{O} $

### Question 40
# Brief Explanations:
Ionic compounds dissociate into ions in water, allowing conductivity. NaCl is ionic (dissociates into Na⁺ and Cl⁻). CO₂, O₂, H₂O are covalent (CO₂ and O₂ don't dissociate into ions, H₂O has very few ions).
# Answer:
C. NaCl

### Question 41
# Brief Explanations:
Hydrogen bonds form between water molecules (H of one H₂O and O of another). Ionic bonds are between ions, metallic between metals, nuclear is for atomic nuclei.
# Answer:
B. Hydrogen

### Question 42
# Brief Explanations:
Anions are ions with a negative charge (gain electrons). Protons are positive, neutrons neutral, cations are positive (lose electrons).
# Answer:
C. Anion

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Question 28

Answer:

Question 29