Compare
Tell what is the same about two or more things
·
Contrast
Tell what is different about two or more things
·
Double Bubble Maps
•
It is a great way to organize your
thoughts when you are comparing and contrasting two things.
•
In the middle you put how the two
objects are alike.
•
On the sides you put how the objects
are different.
·
What can we compare and contrast?
•
Books
•
People
•
Objects
•
Animals
•
Places
•
Music
•
Events
Iron
vs Gold
Iron and gold are metals that has been
in use for a very long time. Both these metals have been a part of every day
life. Gold is the much sought after metal in this world for making jewelery,
coinage and other things. Iron and gold have their own characteristic
difference. They are different in their chemical as well as physical
properties. They differ in their atomic weight, molecular mass and atomic
numbers.
While fresh iron comes in silver color,
gold comes in yellow color. Iron is found on the earth’s crust and core and is
mostly found in oxides like hematite, taconite and magnetite. On the other hand
gold appears as nuggets in rocks and alluvial deposits.
One of the main differences that can be
noticed between iron and gold is that the former metal rusts and the other one
does not. Iron when in contact with the atmosphere forms a red ferric oxide
coating on the surface, which is known as rust.
Coming to the atomic number, Gold has an atomic number of 79 and Iron 26. Gold also has a higher atomic weight than Iron. While the Atomic Weight of gold comes to 196.9665 g mol, iron has an atomic weight of 55.845 g mol. When Iron has a boiling point of 2750 degree Celsius, the boiling point of Gold is just 2000 degrees. Even in melting point, iron tops among the two. Gold comes with a 1062 degrees melting point whereas Iron has a melting point of 1535 degrees.
Another physical difference that can be seen is that Iron is magnetic and Gold is nonmagnetic.
When compared to Iron, gold is chemically inactive. In malleability and ductility, gold has an upper hand than Iron. A small gram of Gold can be beaten into a sheet of one square meter. Well, gold is more expensive than Iron.
Summary:
1. Unlike Iron, Gold is costly.
2. While fresh iron comes in grey color, gold comes in yellow color.
3. Iron is found on the earth’s crust and core and is mostly found in oxides like hematite, taconite and magnetite. On the other hand gold appears as nuggets in rocks and alluvial deposits.
4. Iron rusts whereas gold does not.
5. Iron is magnetic and Gold is nonmagnetic.
6. Iron and gold also differs in their atomic mass, atomic weight, melting point, boiling point and ductility.
Coming to the atomic number, Gold has an atomic number of 79 and Iron 26. Gold also has a higher atomic weight than Iron. While the Atomic Weight of gold comes to 196.9665 g mol, iron has an atomic weight of 55.845 g mol. When Iron has a boiling point of 2750 degree Celsius, the boiling point of Gold is just 2000 degrees. Even in melting point, iron tops among the two. Gold comes with a 1062 degrees melting point whereas Iron has a melting point of 1535 degrees.
Another physical difference that can be seen is that Iron is magnetic and Gold is nonmagnetic.
When compared to Iron, gold is chemically inactive. In malleability and ductility, gold has an upper hand than Iron. A small gram of Gold can be beaten into a sheet of one square meter. Well, gold is more expensive than Iron.
Summary:
1. Unlike Iron, Gold is costly.
2. While fresh iron comes in grey color, gold comes in yellow color.
3. Iron is found on the earth’s crust and core and is mostly found in oxides like hematite, taconite and magnetite. On the other hand gold appears as nuggets in rocks and alluvial deposits.
4. Iron rusts whereas gold does not.
5. Iron is magnetic and Gold is nonmagnetic.
6. Iron and gold also differs in their atomic mass, atomic weight, melting point, boiling point and ductility.
·
Organizing Your Bubble Map
•
Compare = same
•
Contrast = different
•
Organize ideas using a double bubble
map
why Gold can't corroted?
BalasHapusThis is because gold is a pretty unreactive element - you need to start throwing a lot of energy at gold before it will start reacting with anything in the atmosphere. For example, while iron oxide can exist at room temperature, gold (III) oxide decomposes (turns back to gold and oxygen) at 160 degrees Celsius - and that's the most stable gold oxide we've found.
HapusSo what does react with gold? Mostly halogens. Halogens react with pretty much anything and gold also reacts with acids. However, it doesn't react with oxygen, nitrogen, or really any of the gases present in the atmosphere. Which is why you won't see gold corrode
mutia,you have an simple explanation about compare and contrast of gold on iron,and i want to ask question,why iron more easy to get than a gold :)
BalasHapusAs we know, that gold is more expensive than iron so that's why an iron more easy to get than a gold
Hapuseasy on the meaning of How miners get its,thats what i mean-__-
HapusOh sorry..
Hapus• looking for gold:
Gravel bars usually found on the inside of the river bends. Although the gold here is mostly small flakes to very fine, there sometimes is a lot of it.
• looking for iron:
Iron is the fourth most abundant element, by mass, in the Earth’s crust. The core of the Earth is thought to be largely composed of iron with nickel and sulfur.
The most common iron-containing ore is haematite, but iron is found widely distributed in other minerals such as magnetite and taconite.
Commercially, iron is produced in a blast furnace by heating haematite or magnetite with coke (carbon) and limestone (calcium carbonate).
• Conclusin:
It's about rarity and desirability. Iron is abundant and gold isn't
why iron is magnetic and gold is not
BalasHapus
HapusBrcause magnets strongly attract materials (like iron) which already themselves have magnetic domains. They do not significantly attract many metals like gold, aluminum, silver, and even some types of high-chromium stainless-steel, which lack such domains. In fact, pure gold is slightly repelled. A metal detector, if sensitive enough, should pick up the signal from a gold ring.
Tell me about another characteristic about gold and iron....???
BalasHapus• Gold is an excellent conductor of heat and electricity.
HapusIt is a soft, yellow, metal with a beautiful lustrous sheen. It is the most malleable and ductile of all the elements and a single gram can be beaten into a sheet one square meter sheet of gold leaf.
Gold has a very high density, 19.32 g/cm3. (A tennis ball sized sphere of gold would weigh about 5.7 pounds (2.6 kilograms). Gold is not the densest natural element, however. That honor belongs to osmium, followed very closely by iridium. Tennis ball sized spheres of these elements would each weigh about 6.8 pounds (3.1 kilograms).
Gold is unaffected by air, water, alkalis and all acids except aqua regia (a mixture of hydrochloric acid and nitric acid) which can dissolve gold. Gold does react with halogens. It will, for example, react very slowly with chlorine gas at room temperature to form gold chloride, AuCl3. If gold chloride is heated gently, it will decompose to release the pure elements again.
• Iron is a ductile, gray, relatively soft metal and is a moderately good conductor of heat and electricity.
It is attracted by magnets and can be readily magnetized.
The pure metal is chemically very reactive and rusts readily in moist air, forming red-brown oxides.
There are three allotropic forms of iron, known as alpha, gamma, and delta.
Alpha iron, also known as ferrite, is the stable form of iron at normal temperatures.
Why gold can blacken?
BalasHapusBlackened gold would be gold where the surface has been blackened in some fashion. But as a warning, if you have an order to supply "blackened gold" and you and your customer do not have a firm understanding of exactly what that means, the only people who will be happy are the lawyers who will be billing you both by the hour when the customer refuses to pay you
HapusExplain about yellow iron, and whether yellow iron includes gold
BalasHapusYellow iron is any of several permanent synthetic yellow to orange pigments (as Mars yellow) consisting wholly or in part of hydrated iron oxide
HapusWhy are there white and gold rings? What distinguishes his two?
BalasHapusWhile we often think of yellow gold as being pure, the yellow gold used for rings is an allow made by combining pure gold with metals such as zinc and copper. As with other gold colors, the higher the karat amount, the higher the actual gold content, but the less durable the piece of jewelry is. Therefore, 18K or 14K gold is used for wedding and engagement rings. This gives them a beautiful golden hue while helping them to stand up against the demands of everyday wear.
HapusThe main difference between yellow gold and white gold is that white gold is an alloy of gold and a white metal such as palladium, manganese, or nickel. Like yellow gold, white gold’s purity is defined in karats. White gold rings often contain nickel, which provides the strength needed for a durable setting that lasts.