CHEM beast mode > periodic trends > Flashcards

periodic trends Flashcards

(37 cards)

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1
Q

metal +non metal bond

A

ionic

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2
Q

covalent

A

bond bw
non metal-non metal

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3
Q

metallic bond’

A

bond bw
metal and metal

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4
Q

physical property of metals

A
  • high mp
  • good conuctor of heat
  • good conductor of electricity
  • high density
  • malleable
  • ductile
  • lustrous

malleable- can be turned into shapes or sheets
ductile- into wires

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5
Q

physical properties of non metals

A
  • low mp
  • poor conductor of heat
  • poor conductor of electricity
  • low density
  • brittle
  • dull
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6
Q

chem properties of metals

A
  • tends to loose e-
  • low ionisation energy (IE)
  • low electronegativity(EN)
  • good reducing agent
  • forms basic oxides in presence of oxygen
  • reacts with water

ie: energy req to make an atom loose it’s e-

en: ability of an atom to attract an e-

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7
Q

chem properties of a non metal

A
  • tends to gain e-
  • high ionisation energy
  • good oxidising agent
  • forms acidic oxide in presence of oxygen
  • do not react with water
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8
Q

alakli metals
group 1/1A

A
  • H*
  • Li
  • Na
  • K
  • Rb
  • Cs
  • Fr
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9
Q

properties of alkali metals

A
  • least en group
  • forms +1 cations
  • react with water to form hydroxides + H2
  • reacts with oxygen to form basic oxide
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10
Q

true or false all metals have high density

A

FALSE , generally metals have high density
but exception: ALKALI METALS and ALKALI EARTH METALS

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11
Q

electronegativity trend in group 1

A

en increases going up
LI > K

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12
Q

reactivity across group 1

A

increases going down
ie
K > Li

higly reactive

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13
Q

group 2 a

A
  • Be
  • Mg
  • Ca
  • Sr
  • Ba
  • Ra
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14
Q

properties of alkali earth metals

A
  • forms cation with charge 2+
  • react with h2o to form moh + h2
  • reacts w oxygen to form basic oxides
  • low en
  • low density
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15
Q

en trend group 2a

A

increase going up
mg > ca

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16
Q

reactivity trend 2a

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A

increases going down
ie Ra > Mg

17
Q

is zinc a transition metals

18
Q

TRANSITION METALS

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A

sc ti v cr mn fe co ni cu

19
Q

properties of transition metals

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A
  • forms coloured ions
  • incomplete d subshell
  • often acts as catalysts
  • multiple possible ionic charge

eg Fe2+, Fe3+ Mn7+ Mn4+

20
Q

halogens 7a

21
Q

reactivity trend 7A

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A

increases going up
ie
F >cl

opp to metals

22
Q

properties halogens

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A
  • higher EN
  • forms anions -1 charge
  • engaged in displacement reaction
23
Q

en trend halogens

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A

increase going up
F > Cl

24
Q

NOBLE GASES

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A

He
Ne
Ar
Kr
Xe
Rn
Og

25
properties noble gas
* non reactive * full octet * very low electronegativity * monoatomic gases at room temp * *colourles*, odourless
26
atomic radius trend depends on
1. no of shells ns ^ = radius ^ 2. no of protons more protons smaller the radius
27
atomic radius general trend
28
the ability to attract an e-
electronegativity
29
en depends upon
1. valence e- closer to 7 = more EN 2. atomic radius smaller the radius, higher the EN | * noble gas very low en
30
energy req to remove an e- making the atoms into ions
ionisation energy
31
IE depends upon
1. valence e- closer to 8, higher IE 2. atomic radius smaller radius higher ie
32
IE genreal trend
33
EN general trend
34
melting / boiling pt
* group 1 : increases going up * group 17: increases going down * For Period 2: increases going right (up until and including carbon) * For Period 3: Increases going right (up until and including silicon)
35
zeff / effective nuclear charge
postive attraction of proton felt by valence e- *zeff= no of proton - no of non valence e-*
36
trend for z eff
Increases going right (since we are not increasing non-valence electrons while decreasing radius)
37
ionic radius
radius of element's ion depends upon 1) no of shells more shells more IR 2) no of proton more protons less IR **cation < element** **anion > element** | cations are smaller than elements where as anions are bigger
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