O-Level Chemistry

[tutor76]

Post using one drive pic now

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[tutor76]

Answer !!!


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[Newtandcucumber]

here is a link to a well rate site used in the UK for all sciences


http://www.docbrown.info/

[tutor76]

question on organic chemistry !

http://i64.tinypic.com/34smc76.png\">

[trusttuitionagy]

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[happyheart]

trusttuitionagy:

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[trusttuitionagy]

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[Jaszon99]

Hi can anyone help me with chemical equation symbol/state? How do I know whether an element or compound is an aqueous, solid or liquid? I’m always having trouble with questions that ask me to write equation that need to include state. Thank you

[bright-culture]

Hi Parents, I wrote this article that might be useful for you, especially as we approach the O Levels!!!


Tip 3: Switch up topics while preparing for the exams

http://www.bright-culture.com/4-ways-to-prepare-for-chemistry-exams/

Help your child during exams with these FREE E-Books! (Just leave your email and I'll send it to you)

http://www.bright-culture.com

https://www.bright-physics.com.sg

[questionable_i]

Jaszon99:

Hi can anyone help me with chemical equation symbol/state? How do I know whether an element or compound is an aqueous, solid or liquid? I'm always having trouble with questions that ask me to write equation that need to include state. Thank you

Hi @Jaszon99, An element is a species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z). There are 118 elements that have been identified, of which the first 94 occur naturally on Earth with the remaining 24 being synthetic elements. (In a simpler words would be that the easiest way to identify them would be if you can find the chemical symbol in the periodic table, then it is an element) (An example of an element would be Na-Sodium which can be found in the periodic table)

A compound is a substance consisting of atoms or ions of two or more different elements in definite proportions joined by chemical bonds into a molecule. The elements cannot be separated by physical means. Water, for example, is a compound having two hydrogen atoms and one oxygen atom per molecule. (H2O)

Hope this helps anyway.