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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Everything in our world is composed of one or more elements. For instance:
The atmosphere is composed of elements like nitrogen, oxygen and noble gases.
Please read on the Constituents of the Atmosphere here.
Humans are composed of elements like carbon (C), iron (Fe), calcium (Ca), sodium (Na), chlorine (Cl) and so on
Please read on Macro-Nutrients in Humans, their Sources, Functions and Deficiencies here.
Various materials and objects are made of elements. For instance:
In chemistry, an element may be defined as the simplest form of a substance that cannot be broken down by chemical means.
Consider the instance below:
When one attempts to split a pure gold (element) into particles (or tiny pieces), all they see is the same thing (gold) on each particle, nothing else.Please read on Interesting facts about Gold here.
Elements are naturally occurring in the universe. In fact, life is present on earth because of the type of elements found in it.
On other planets, the elements that are necessary for life are not present in sufficient quantities. For instance, these other planets will either have little or no oxygen in their atmospheres.Please read on the Planets and their Characteristics here.
Think about the followings for a moment:
Before we list on some notable points concerning elements, it's a good idea to understand their careful arrangement on the periodic table.
Atomic number is defined as the number of protons in the nucleus of an atom.
Isotopy is a phenomenon whereby atoms of the same element have the same atomic number different mass number.
Please read more on Dalton's Atomic Theory and its Modification here.
It is the number(s) of protons that defines or make unique an element.
For instance, Hydrogen is hydrogen simply because it has only one proton. Oxygen is oxygen because it has eight protons.
Isobars are elements that have different atomic number but same mass number.
Please read more on Dalton's Atomic Theory and its Modification in the above link for further explanations and examples.
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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