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Biological&Chemical Systems > Electron Structure&Chemical Bonding > Flashcards

Electron Structure&Chemical Bonding Flashcards

1
Q

A pure substance made of only one kind of atom.

A

Element

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2
Q

A chemical compound is..?

A

Substance of two or more atoms chemically joined.

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3
Q

Proton charge

A

+1

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4
Q

Neutron charge

A

0

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5
Q

Electron charge

A

-

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6
Q

The bottom number is…?

A

Number of protons (atomic number)

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7
Q

Mass number is..?

A

Protons+neutrons (top number)

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8
Q

Neutrons=

A

Top-bottom number

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9
Q

What must equal in an atom?

A

Protons&Electrons

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10
Q

Isotope have…

A

Different mass so different neutrons

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11
Q

They have the same …. but different ….

A

Chemical properties

Physical properties

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12
Q

The larger the mass, the …. melting point.

A

Higher

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13
Q

The TOF is based on an atoms…

A

Mass

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14
Q

To find the Ar in TOF

A

(Abundance x m/z) x (abundance x m/z)

100

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15
Q

Order of sub levels

A

1s2 2s2 2p6 3s2 3p6 4s2 3d10

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16
Q

What elements are an exception of the sublevels?

A

Cu and Cr

17
Q

What loses electrons?

A

Metals

18
Q

What gains/shares electrons?

A

Non-metals

19
Q

What behaviour of group of elements is inbetween sharing electrons?

A

Metalloids

20
Q

Why is 4s higher than 3D?

A

Due to energetically

21
Q

What is ionic bonding?

A

Chemical attraction by electrostatic force of attraction between OPPOSITELY CHARGED IONS.

22
Q

What bonding forms a lattice?

A

Ionic

23
Q

What bonding is a pair of electrons shared between two non-metals?

A

Covalent

24
Q

Dative Covalent bonding is…?

A

Electron shares between one atom

25
Q

The measure of the relative ability of an atom to attract a shared electron pair in a covalent bond is?

A

Electronegativity

26
Q

Electronegativity depends on 3 things:

A
  1. Nuclear charge
  2. Atomic radius
  3. Shielding
27
Q

What does electronegativity favour?

A

Large nuclear charge
Small atomic radius
Low shielding

28
Q

Electronegativity increases…

A

Across a period

29
Q

Electronegativity decreases…

A

Down a group

30
Q

Bond polarity is caused by

A

Unequal share of electrons

31
Q

Even sharing of electrons…?

A

Non-polar

32
Q

Is in a linear shape, polarity….

A

Cancels out

33
Q

Intermolecular forces from weak to strong

A
  1. Van deer walls
  2. Dipole-dipole
  3. Hydrogen
34
Q

Ionic compound properties (4)

A
  1. Brittle
  2. High melting point
  3. Good conductor of electricity when dissolved
  4. Solid at room temp
35
Q

Properties of covalent compounds (3)

A

Gases or liquid at room temp
Low boiling points
Poor conductors

36
Q

Hydrogen bonding only in…

A

Nitrogen
Fluorine
Oxygen

Biological&Chemical Systems (18 decks)

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