Topics in ChemistryChemistry Scheme of Work, SS1, First Term Chemistry Scheme of Work, SS1, Second Term Chemistry Scheme of Work, SS1, Third Term Compounds in Chemistry: Characteristics of Compounds Types of Mixture: Homogenous and Heterogeneous Mixtures Mixtures: Characteristics of Mixtures Physical Properties of Matter explained with Examples Chemical Properties of Matter explained with Examples Differences between Physical and Chemical Change Ionic Theory and Electrolysis Physical and Chemical Properties of Acids States of Matter: Characteristics of Solids Liquid State of Matter: Characteristics of Liquids Gaseous State of Matter: Characteristics of Gases Molar Mass, Worked Examples and Differences with Molecular Mass Elements: Characteristics of Elements Salts and Types of Salt in Chemistry Mixtures and Separation of Mixtures Mixtures and Separation of Mixtures - part 2 Mixtures and Separation of Mixtures - part 3
Academic Questions in Chemistry
The Separating Funnel is a technique used in the separation of mixtures. Another name for Separating Funnel is the _____ Funnel.
2NH4+(aq) + Ag+(aq) -> 2H4AgN
The equation above represents _____ acid.
A. Svante Arrhenius'
C. Gilbert Lewis'
E. Sir Isaac Newton's
F. Albert Einstein's
According to Brønsted Thomas Martin Lowry, an acid is defined as _____.
A. Any substance that produces hydrogen ion (H+) when dissolved in water
B. A substance that accepts electron pair in a chemical reaction
C. A substance that gives out hydronium ion (H3O+) when dissolved in water
D. A substance that donates a proton in a chemical reaction
E. A substance that reacts with a base to form salt and water
F. A substance whose hydrogen ions (H+) are displaced after a reaction with metals higher in the activity, reactivity or electrochemical series
Which of the following is NOT a characteristic of chemical change?
Which of the following statement is FALSE concerning a physical change _____.
The following substances will sublime EXCEPT _____.
Which of the following is a state of matter?
The ideal way of separating a mixture of blood is through _____.
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Gold is a symbol associated with kings. It is a metal of value; as many prefer to adorn themselves with it. It is also very useful for making decorations.
Interesting and amazing facts are associated with this precious metal (Gold). For instance, some persons would tell you that "gold is eatable" and that's quite true; and a statement of fact.
In this article, well will consider some interesting facts about GOLD.
It is the only metal that has a gold (golden) color.
Gold is present inside the earth crust in all the seven continents.
Pure gold is soft and very stretchable (It can even be stretched into threads).
The Latin name of Gold is “Aurum” which means “shining dawn”. For this reason, its chemical symbol is “Au”.
Gold is a very good conductor of electricity. This is why it’s sometimes used in making USB and audio cables.
Gold is non toxic and can be eaten with food. It is sometimes added to desserts in some expensive restaurants.
The term Gold originated from an ancient English word “geolu” which means yellow.
24karat gold is the purest gold element.
Gold is a noble metal. This means that it chemically inert, unreactive, cannot rust nor become oxidized.
Gold is the 58th rarest element among all the elements found beneath the earth crust.
Gold is a transition metal in the periodic table.
Please read on the Periodic Table and Classification of Elements here.
At present, the country buying the largest number of gold is China, followed by India.
Gold’s melting point is 2063oF (oF means degree Fahrenheit).
Gold is the most malleable and ductile pure metal ever known.
Malleability means that gold can be hammered into thin sheets.
Ductility means it can stretched and drawn into wires.
Please read on the Physical Properties of Metals here.
Although acid dissolve most metals, a certain mixture of acids called aqua regia is used to dissolve gold.
Gold is usually measured in ounces and tons.
Please on Fundamental and Derived Units here.
Gold is the major mineral in California, USA.
Pure gold is odorless and tasteless.
Pure gold will not irritate your skin.
After 1912, the Olympic gold medal ceased to be pure gold.
The world’s deepest gold mine is 2.5 miles deep and is found in Mponeng in South Africa.
Gold is one of the first metals to be discovered by man.
One ounce of gold can be drawn into a thread length of 60 miles.
South Africa is the world’s largest gold distributor.
Gold can be found on planets Mars, Mercury and Venus according to scientists.
Please on the Solar System and Planets here.
Switzerland was the last country to add gold to its currency. Their currency had gold in it until 1999.
The country holding the most gold in the world is the United States of America with 8,133.5 tons.
Gold had been used as currency with monetary value.
Please on the various Methods of Payments through Commercial Banks here.
About 88,000 tons of gold have been mined from the earth.
Gold Chloride (AuCl3) and Gold Oxide (Au2O3) are used in making red colored glass.
Please read more on Ceramics here.
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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.
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Amazing facts in Chemistry
The only letters that failed to appear on the periodic table are letters:
Gold and copper are the only two non-silvery colored metals.
Copper is the only metal that is naturally antibacterial. This is why you would see some children utilize 'copper' water bottles in schools
Water actually freezes faster when it’s warm than when it’s cold
Most element in their pure state exists physically in different forms. For instance, pure carbon can exist as both diamond and graphite. This phenomenon is called allotropy.
If you pour a handful of salt into a full glass of water, the water level will go down rather than overflowing the glass.
Similarly, if you mix half liter of water and half litre of alcohol, the total volume of the liquid will be les than one litre
NOTABLE POINTS IN Chemistry