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Chemistry > Exam II > Flashcards

Exam II Flashcards

(55 cards)

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1
Q

Electro negativity

A

How well an element can attract electrons

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2
Q

What is the most electronegative atom

A

F

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3
Q

What group is not electronegative

A

Noble gases

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4
Q

What is the periodic trend of electro negativity

A

Increasing across from left to right

And increasing moving up the periodic table

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5
Q

What group is the most electronegative

A

Halogens because they have 7 valence electrons

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6
Q

What is an ion

A

A charged particle

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7
Q

How are ions made

A

When atoms gain or lose electrons

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8
Q

What atoms are more likely to form ions and why

A

Elements that only need to lose or gain 1 electron for a full shell, because it requires less energy.

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9
Q

Which groups on the periodic table are more likely to become ions

A

1,2,6,7

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10
Q

Cation

A

Positive ion

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11
Q

Anion

A

Negative ion

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12
Q

Polyatomic

A

Has both a cation and anion

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13
Q

What is the first & second part of naming polyatomic ions

A

First. Second

Name of metal Polyatomic ion

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14
Q

What needs to be done before finding the chemical formula of ions

A

Balance the charges first

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15
Q

Which comes first in the polyatomic formula, the cation or the anion

A

Cation

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16
Q

What is an electron neutral compound

A

An ionic compound that contains one cation for every anion, the charges are equal.

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17
Q

Steps to finding the formula of an ionic compound

A
  1. Identify cation + symbol/charge
  2. Identify anion + symbol/charge
  3. Combine the two ions to form an electrically neutral compound
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18
Q

Find charge of Mg^2+ Cl^-

A

Mg1Cl2

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19
Q

What happens to an ion when it loses an electron

A

It becomes a cation

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20
Q

What happens when an ion gains an electron

A

It becomes an anion

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21
Q

Compounds are neutral when

A

Cations and anions are equal

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22
Q

When 2 bonded atoms share electrons unequally the bond is

A

Polar

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23
Q

When two bonded atoms share electrons equally the bond is

24
Q

How is a bond determined to be covalent or ionic

Study These Flashcards
A

Electro negativity differences

25
Electro negativity difference for a polar covalent bond is
.4-1.7
26
Electronegativity difference for covalent bonds
27
Electronegativity difference for ionic bonds
> 1.7
28
Which side of the periodic table has a lower electronegativity
The left side
29
Which side of the periodic table has a higher electronegativity
The right side
30
What is electron affinity
Energy released when an electron is added to the atom
31
What is the periodic trend for electron affinity
The electron affinity becomes more negative from left to right, and doesn’t have much change from top to bottom
32
What is the electron affinity of noble gases
>0
33
Why are electron affinities for elements in 2A more positive?
Because addition of an electron requires it to reside in the previously unoccupied “P” subshell
34
Why are elements in group 5A more positive in electron affinity?
Because the addition of electron requires it to be put into an already occupied orbital
35
What groups are exceptions to the trend in electronegativity on the periodic table?
2A and 5A, because they are more positive than the groups prior
36
What does polyatomic mean?
2 ions with an overall charge
37
Compound name -> chemical formula for Magnesium Carbonate
Mg^2+ CO_3^2-
38
Chemical formula -> compound name For LiC(subscript2)H(sub3)O(sub2)
Lithium Acetate
39
Which group is more likely to give away electrons A. Metals B. Non metals
Metals
40
Which group is more likely to want to acquire electrons? A. Nonmetal B. Metals
A. Nonmetals
41
If Mg gives away 2 electrons to F, what charge does it acquire?
2+
42
if F gains an electron from Mg, what charge does it acquire?
-
43
What does the Roman numeral in an ionic compound indicate?
The charge of the transition metal
44
How are covalent compounds written?
Prefix+ name of nonmetal then prefix+ nonmetal ending in “ide”
45
What does the prefix mono mean?
1
46
What does the prefix “di” mean?
2
47
What does the prefix “tri” mean
3
48
What does the prefix “tetra” mean?
4
49
What does the prefix “penta” mean?
5
50
What does the prefix “hexa” mean?
6
51
What does the prefix “hepta” mean?
7
52
What is the prefix meaning 8?
Octa
53
What does the prefix “Nona” mean?
9
54
What is the prefix meaning 10?
Deca
55
Do you have to balance charges for covalent compounds?
No

Chemistry (3 decks)

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