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Chemistry Chapter 4 Review

Test Description: Atoms and Bonding

Instructions: Answer all questions to get your test result.

1) An ionic bond is the attraction between

AOppositely charged ions BSimilarly charged ions C2 different atoms DAn ion and an atom

2) What creates a metallic bond?

A2 different metal atoms bonded by sharing electrons. B2 Oppositely charged ions bonded. CThe attraction between a positively charged metal ion and free flowing electrons. D2 similar metal atoms bonded.

3) Which of the following best describes a metal crystal?

AMetal atoms held together by ionic bonds BMetal atoms held together by covalent bonds CNeutral metal atoms surrounded by freely moving valence electrons DPositive metal ions surrounded by freely moving valence electrons

4) The atomic number of an element is based on the _________________.

AMass of its nucleus BNumber of neutrons in its nucleus CNumber of electrons around its core DNumber of protons in its nucleus

5) A material is said to be ductile if it _____________

ACan transfer heat or electricity to another material. BCan be pulled out, drawn, into a long wire CCan be hammered into sheets DIs a mixture of a metal with at least one other element

6) Which particles in atoms have a negative charge?

AProtons BNeutrons CElectron DNucleus

7) In an atom the number of protons equals the number of __________

ANeutrons BElectrons CNeutrons + Electrons D8

8) Covalent bonds _________________ electrons as they form.

ATransfer BSteal CShare DTrade

9) Ions form when atoms either ____________ electrons.

ASteal or trade BShare or loan CLose or gain

10) Magnesium bromide is a ionic compound with a chemical formula MgBr2. What does the 2 stand for?

AThere are 2 magnesium atoms in the compound BBromide has a 2+ charge CBromide has a 2- charge DThere are 2 Bromine atoms in the compound

*select an answer for all questions

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