FINALS ( GROUP 2 HALOGENS) Flashcards
Halogen originates from the greek words ____ meaning ___ and ___ meaning ___ which signify salt former
Halos
Salt
Genes
Born
Halogens are found in group ___ or group ___ of the periodic table
VIIA
17
Halogens all have the electron configuration ___ resulting in ___ valence electron. They are one electron away of having the entire outer s and p subleve, making them very reactive.
ns2np5
Seven
In their elemental state halogens became ___ molecules (F12, C12, Br2 and I2)
Diatomic
Fluorine atomic number and symbol
Chlorine “ “
Bromine “”
Iodine “”
9 ( F)
17 (CI)
35 (Br)
I (I)
The physical state of halogens goes from ___ to ___ .
Fluorine and chlorine are ___
Bromine is ___ and Iodine is ___ at a room temperature
Gas
Solid
Gases
Liquid
Solid
Fluorine color is ____
Chlorine is ___
Bromine is ___
And iodine is ___
Pale yellow
Greenish-yellow
Reddish-brown
Violet
Halogens solubility is affected by their ___ and it decreases as you go down the group
Polarity
The density of halogens ___ as you go down. Fluorine is the ___ while iodine is the ___
Increases
Less dense
Denser
The melting and boiling points of halogens ___ as you go down the group
Increases
Halogens are HIGHLY REACTIVE due to high ____ and ___
Electronegativity
Electron affinity
Halogens are strong ___. They oxidized other substances by accepting Electrons
Oxidizing agent
The halogens are highly electronegative elements. The electronegativity of the halogens ___ down the group
Decreases
Halogens form compounds known as ___ when they react with metals and non metal
WITH METALS: it forms _____ (ex. NaCI, KBr)
With nonmetals : it forms ____ (Ex. HCI, HF)
Halides
Ionic bonds
Covalent bonds
Halogen reacts with hydrogen to form _____
EX: HF, HCI, HBr, HI
Hydrogen halide
Halogen combines with oxygen to form ___
Halogen oxides
Occurs when a more reactive halogen replace a less reactive halide in compound
Displacement reaction
Halogen can combine with each other to form ____
Interhalogen compounds
Halogens react with ___ differently depending on their position in the group
Water
The most reactive and electronegative element
Fluorine
Highly reactive and forms compounds with many other elements
Chlorine
It is highly reactive and does not occur freely in nature
Bromine
Compounds in which one or more hydrogen atoms in an alkane have been replaced by halogen atoms (Fluorine, chlorine, bromine or iodine)
Alkyl halides (Haloalkanes)
CH2 between two other (CH3- CH2-Br) are _____
CH between two other (CH3- CH- CH3) are ____
C between four other (CH3 - C- CH3 ) are ___
Primary alkyl
Secondary alkyl
Tertiary alkyl
Organic compounds that have a halogen atom attached to an organic ring
Aryl halides (Haloarenes)
Used in many commercial products including solvents, motor oil additives and in the synthesis of other products
Aryl halides
Are highly reactive substance used primarily in organic synthesis to introduce the acyl group
Acyl halides (acid halide)
They react with water, ammonia, and alcohols to give carboxylic acids, amides and esters respectively
Acyl halides
Most acyl halides are ___ insoluble in water
Liquids
Hydroxyl group hase been replaced by a ____
Halogen
Acetyl chloride and ethanoyl chloride are examples of
Acyl halides
What is considered gas between the four elements
Fluorine
What color is bromine
Reddish-brown
Halogens are highly reactive due to high ___ and electron affinity
Electronegativity
(True or false) Halogen are compounds known as halides when they react with metals and non-metals
True
Hydrogen replaced with halogens in an alkane group
Alkyl halides
