Week 1 Flashcards

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1
Q

The nucleus of an atom contains

A

Protons and Neutrons

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2
Q

What type(s) of electron subshell(s) does an L shell contain?

A

s and p

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3
Q

What is the maximum number of electrons that an M shell may contain?

A

18

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4
Q

The electrons that occupy the outermost filled shell are called __________ electrons.

A

Valence

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5
Q

An element with the electron configuration 1s2 2s2 2p6 3s2 3p6 has how many electrons?

A

18

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6
Q

Match the electron structure below with the element type it represents.

1s22s22p63s23p64s1

A

Alkali metal

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7
Q

What is the predominant type of bonding for titanium (Ti)?

A

Metallic

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8
Q

How do you calculate the calculate the ionic character of a substance

A

% ionic character = 1− e ^(− (XA−XB)^2)/4

where XA & XB are Pauling electronegativities
Mixed primary bonding
x (100%)

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9
Q

What does the quantum number n stand for

A

principal quantum number

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10
Q

What does the quantum number l stand for

A

subshells

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11
Q

What does the quantum number ml stand for

A

no. of energy states in subshell

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12
Q

What does the quantum number ms stand for

A

spin moment

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13
Q

What are the electronic configuration letters

A

n, p, d, f

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14
Q

What is the typical bonding type for ceramics

A

ionic bonding

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15
Q

Are metallic substances good conductors

A

yes

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16
Q

What type of secondary bonding occurs in polymers

A

Van der waals bond (weak electrostatic attraction)

17
Q

Bonding energy: what type of bonds are non directional

A

ionic and mettallic

18
Q

Bonding energy: what type of bonds are directional

A

Covalent and secondary

19
Q

If the bond strength has i high melting point and energy will the co-efficient of thermal expansion be large or small

A

small

20
Q

do polymers have a high or low melting point

A

low

21
Q

Atoms are packed densely when they are

A

crystalline

22
Q

What does amorphous mean

A

non crystalline

23
Q

What is a unit call

A

smallest cell that completely describes the lattice

24
Q

How many crystal systems are there?

A

7