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MECH390 Dr Jaber Abu Qudeiri Lecture 2: The Nature of Materials Quiz

10 Questions

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MECH390 Dr Jaber Abu Qudeiri Lecture 2: The Nature of Materials Quiz

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Questions and Answers

What is the basic structural unit of matter?

Nucleus

Electron

Atom (correct)

Molecule

How many known elements are there currently?

118 (correct)

104

What does the atomic number represent?

Number of electrons in the nucleus

Number of protons in the nucleus (correct)

Number of neutrons in the nucleus

Atomic weight of the element

What is the atomic weight?

Weight of one atom in a mole of the element Signup and view all the answers

What balances the positive charge of the nucleus in an atom?

Electrons Signup and view all the answers

Which type of bond involves the exchange of valence electrons?

Ionic bond Signup and view all the answers

In which electron shell are valence electrons located?

Outer shell Signup and view all the answers

Which element readily gives up electrons to become a positive ion?

Potassium Signup and view all the answers

What are the properties of an ionic bond?

Poor ductility, high electrical conductivity Signup and view all the answers

In covalent bonding, what happens to the outer electrons?

They are shared between atoms Signup and view all the answers