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chem > Period 3, Group 2, and Halogens > Flashcards

Period 3, Group 2, and Halogens Flashcards

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1
Q

list period 3 elements in order

A

Na Mg Al Si P S Cl Ar

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2
Q

atomic radius ____ down period 3

A

decreases

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3
Q

Across the period from Na to Si, the ions get ______

A

smaller

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4
Q

Nuclear charge _____ across period 3

A

increases

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5
Q

Electrical conductivity _____ from Na + to Al 3+, then ____ to silicon

A

increases decreases

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6
Q

Conductivity and melting point ______from sodium to aluminum because the sea of delocalized electrons increase the charge of the metallic lattice

A

increases

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7
Q

what element has the strongest metallic bond in period 3

A

aluminum

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8
Q

________ is a metalloid

A

silicon

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9
Q

Elements to the _____ of silicon are non-metallic, have weak id-id forces which make them easier to break

A

right

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10
Q

in period 3, ionization energy ______ across the period

A

increases

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11
Q

in period 3, electronegativity ______ across the period

A

increases

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12
Q

elements in period 3 get more acidic or basic across the period?

A

acidic

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13
Q

does argon react with oxygen?

A

no

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14
Q

oxidation number increases or decreases across period 3

A

increases

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15
Q

does aluminum oxide dissolve or react with water

A

no

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16
Q

__________ is insoluble in water because water can’t break down the molecular structure, but can react in hot conc. alkali

A

silicone dioxide

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17
Q

Covalently bonded non-metal oxides of P and S react with water to form what?

A

an acid

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18
Q

Oxides of Na and Mg (ionic) react with water and produce ________ solutions

A

alkaline

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19
Q

Insoluble oxides react with hot conc. NaOH to form what?

A

a soluble salt

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20
Q

period 3 chlorides go from ______ to _______ across the period

A

ionic covalent

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21
Q

period 3 ______ go from ionic metallic to just metallic across the period

A

chlorides

22
Q

melting point _______ down group 2

A

decreases

23
Q

reactivity ___________ down group 2

A

increases

24
Q

atomic radius ________ down group 2

A

increases

25
Q

Ionization energy ______ down group 2

A

decreases

26
Q

Metals react with dilute HCl to from a metal ______ and _____ gas

A

chloride hydrogen

27
Q

Group 2 metals burn rapidly in oxygen gas and form what?

A

white solid oxides

28
Q

Oxides of group 2 metals can be neutralized by what?

A

dilute acid

29
Q

Basic oxide + dilute acid -> ____ + ____

A

salt and water

30
Q

Magnesium and steam produce what?

A

magnesium oxide

31
Q

Solutions formed from reactions of group 2 oxides with water get more ______ down the group

A

alkaline

32
Q

Group 2 oxides react with water to form a what?

A

hydroxide

33
Q

Solubility of group 2 hydroxides _____ down the group

A

increase

34
Q

Alkaline hydroxides of group 2 metals will be neutralized by what?

A

dilute acid

35
Q

Barium sulfate forms as a what?

A

white precipitate

36
Q

Mg Ca Sr and Ba are all ________ __ _____

A

insoluble in water

37
Q

Carbonates will react in dilute acid, forming ______ + ________ + ______

A

salt water CO2

38
Q

Group 2 carbonates and nitrates decompose with what?

A

heat

39
Q

group 2 carbonates break down to a metal oxide and

A

CO2

40
Q

Temperature at which thermal decomposition of group 2 carbonates _______ down the group

A

increase

41
Q

what is formed in group 2 nitrate is thermally decomposed?

A

brown toxic gas

42
Q

list group 17 elements

A

F2, Cl2, Br2, I2

43
Q

The color of halogens gets _________ down the group

A

darker

44
Q

Atomic radius ____ down group 17

A

increases

45
Q

melting/boiling point ______ down group 17

A

increases

46
Q

halogens are _____ agents

A

oxidizing

47
Q

When a halogen reacts with a metal, the _______ gains the electron

A

halogen

48
Q

electronegativity _______ down group 17

A

decreases

49
Q

X2(g) + H2(g) -> 2_____(g)

A

HX

50
Q

thermal stability _______ down group 17

A

decreases

51
Q

bond energy _______ down group 17

A

decreases

52
Q

Cl- Br- and I- will react with conc. HCl and form a ______ gas

A

toxic

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