Chemical bonding : Lesson 8

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Chemistry

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University

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Mohamad Termizi Nurdin

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3 Slides • 10 Questions

Chemical bonding : Lesson 8

by Mohamad Termizi Nurdin

Multiple Choice

What is the basis of a metallic bond?

the attraction of neutral metal atoms.

the attraction between protons and neutrons.

the attraction between positive metal ions and interlocking electrons.

the attraction between positive metal ions and free floating electrons.

Multiple Choice

There are more metals than non metals in the periodic table.

True

False

Multiple Choice

At room temperature, most metals are

liquid

solid

gas

an alloy

Multiple Choice

What does malleable mean?

able to be shaped

will break easily

can be used for wire

is shiny

Multiple Choice

Which of these is NOT an alloy?

bronze

copper

brass

stainless steel

Multiple Choice

Electrons that are free to move in metals

delocalized electrons

oxidation number

chemical bond

salts

Multiple Choice

What is the ability of a substance to be pulled into a thin strand?

Malleability

Ductility

Conductivity

Solubility

Multiple Choice

Why do metals have high melting points?

They don't

The negatively charged electrons act as a glue to hold the positively charged ions together.

All the electrons become delocalised

Multiple Choice

Why do metals conduct

They are shiny

The electrons are held tightly within the lattice

The electrons are delocalised and able to move

The electrons are shared between two metal ions

Multiple Choice

Why does the melting point of metals increase across period 3, from Sodium (Na) to Aluminium (AI)?

Size of atoms gets smaller

Attraction force between nuclei and free electron increases

Increased space between the valence electrons in the "sea"

Increased number of valence electrons contributed to the "sea"

Chemical bonding : Lesson 8

by Mohamad Termizi Nurdin

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