Chemistry Class by Nathalie Gallaron https://padlet.com/nathaliegallaron/lm63u41dmoph What I learned for the whole week en-us 2016-12-11 08:50:12 UTC 2025-10-02 23:13:39 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/File.png nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142977960 For the whole week, the lesson was about Pure substance, mixtures, compounds, atoms, elements and symbols, periodic table of elements and isotopes. I learned that pure substances are of definite composition like salt and sugar. An element is composed of only 1 type of atom while a compound is made up one or more elements such as Sodium Chloride(NaCl). A mixture can be either homogeneous - where the materials being mixed is not visible in the naked eye - or heterogeneous -where the different  materials being combined are visible. 
The atom in one element differ from one element to another. There are three subatomic particles located in an atom and are named proton, electron and neutron. The atomic number of an atom depends on the number of protons present while the mass number depends on the presence of protons and neutrons in an atom. Lastly, I learned that an element, say for example Chlorine, can have  a different mass number even if it is just two the same element and that is called an isotope. ]]> 2016-12-11 08:54:40 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142977960 Learning from Smaller to BIGGER nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979093 2016-12-11 09:33:36 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979093 nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979303 2016-12-11 09:40:37 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979303 nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979322 2016-12-11 09:41:07 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979322 Both Sugar and Salt are fine example of Pure substances nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979424 2016-12-11 09:43:42 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142979424 nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981028 2016-12-11 10:27:09 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981028 The mixture of oil and water is one common example of heterogeneous mixture. Bot oil and water have different polarity so technically its particles are visible when combined. nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981054 2016-12-11 10:27:56 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981054 nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981137 2016-12-11 10:30:15 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981137 Milk dissolve in hot water but some of its particles can be seen. This mixture is a type of colloid. nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981317 2016-12-11 10:35:07 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981317 nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981490 2016-12-11 10:39:58 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981490 Proton, Neutron and Electron are the subatomic particles of an atom. Proton and Neutron are both located in the nucleus while electrons surrounds the nucleus. Proton has a positive charge, electron has a negative charge and a neutron has a net charge of 0. nathaliegallaron https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981673 2016-12-11 10:44:32 UTC https://padlet.com/nathaliegallaron/lm63u41dmoph/wish/142981673