- 1. Chemical bonds form when atoms
A) gain protons
B) combine nuclei
C) give up neutrons
D) share or transfer electrons
- 2. A mystery substance is known to be a chemical compound. What can you infer about the substance?
A) It is composed of just two elements
B) It consists of molecules
C) It has a fixed composition
D) It forms crystals
- 3. Ionic bonds form between
A) any two elements
B) a metal and a nonmetal
C) two nonmetals
D) two metals
- 4. Which of the following is not a property of an ionic compound?
A) malleability
B) high boiling point
C) high melting point
D) ability to dissolve in water
A) all of the choices
B) nonpolar compound
C) chemical compound
D) ionic compound
- 6. All covalent compounds
A) are solid at room temperature
B) have high boiling points
C) contain ions
D) consist of nonmetallic elements
- 7. Which alloy was made first?
A) brass
B) none of the choices
C) steel
D) bronze
- 8. All chemical bonds involve two atoms sharing electrons
A) true
B) false
- 9. The 3 in NH3 is the atomic number of hydrogen
A) false
B) true
- 10. Positive ions form when atoms lose electrons
A) true
B) false
- 11. Metallic bonds are between metals and nonmetals
A) true
B) false
- 12. A unique substance that forms when elements combine chemically is a(n) ___________.
- 13. Atoms are held together by ______________.
- 14. An ionic bond forms when atoms ________ electrons.
- 15. Bonds that form between two nonmetals are called ____________.
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