understanding of atoms, elements, compounds, molecules
Atom
Atom is the smallest piece of an element
Atoms consist of :
- Proton: positively charged
- Electron: negatively charged
- Neutrons: uncharged (neutral)
Element
Compound
The compound is a single substance consisting of two or more elements that can be decomposed into a simpler form through chemical reactions.
Molecule
molecule is defined as a group of atoms (at least two) are linked to each other with a very strong (covalent) in a specific arrangement and electrically neutral and stable enough.
The materials (substances) is anything that has mass and volume. Therefore the material has a volume, it must occupy a certain space. All the things that we can see or we touch, such as solar, wind, books, glass, water and even our own bodies, all of them are composed of material. The chemistry in the investigation of studying the properties and changes of matter.
Matter has three states in nature, namely liquid, solid and gas.
Each material has characteristics that can be used to describe these materials, this characteristic known as the nature of the material.The physical properties of a material is the character which can be determined directly without going through the conversion of a substance into the new.The physical properties are divided into two, namely the nature of qualitative and quantitative traits.Qualitative properties are properties that can be described with words.Quantitative trait is the nature that can only be described with numbers and measurement.
While the chemical nature is a character that can only be known after converting it to form new substances (reacting).
While the chemical nature is a character that can only be known after converting it to form new substances (reacting).
material classification
Each material can be classified into two groups, namely a mixture of substances and pure substances.- Substance physical mixture is a combination of two or more materials. Such as the soil is a mixture of sand, silt and humus foliage.
- Substance mixture evenly mixed and difficult to separate referred to as a homogeneous mixture, whereas that can be easily separated, so-called heterogeneous.
- Pure substances are substances that have a single composition, not mixed with other substances. For example, an iron is a pure material.
- Pure substance derived from a chemical element called element / chemical element, while the pure substance which is a combined result of two reactions is called chemical elements.
Examples of chemical compounds: water (H2O), methane (CH4), propane (C3H8) etc.
Whay do you think about atoms? Why we should learn about it?
BalasHapusThe atom is the smallest part of the element, Because in the next learner we will use this lesson for our next foundation
HapusHiiii Yogik, I'm Novi,, want to ask you, Why does a homogeneous and heterogeneous mix happen? Give me some examples and explain about it
BalasHapusThe heterogeneous mixture is a mixture consisting of two or more substances having different phases.
HapusFor example, sand is introduced into water, this mixture is a heterogeneous mixture because it consists of materials having different phases, sand in the solid phase and water in the liquid phase.
The homogeneous mixture is a mixture consisting of 2 or more substances in the same phase.
For example a small amount of salt (NaCl) is introduced into water, the salt will slowly disappear. The salt that has been inserted is soluble in water and because the salt, water and salt dissolves, it forms a new substance that has different properties from the pure substance.
Hi Yogik. Thx for information, but i have a question for you, so what the summary that we can take from your post?
BalasHapusMuch can we take from my post, for example we can distinguish homogeneous mixtures and heterogeneous mixtures, etc
Hapuscan you give a example about element and show the electron, proton, and neutron
BalasHapusPrevious thanks for your comment
Hapusfor example : element Carbon have atom mass is 12 and atom number is 6. Then element C has 6 electron and 6 proton, This amount is derived from the atom number held by the element C, and to neutron you can get it by reducing the atom mass with the atom number, so 12 - 6 = 6
Hi yogi. could you give me the difference between substances and pure substances?
BalasHapushi rahmi.
HapusPrevious thanks for your comment
1. Pure substance contains only one kind of constituent substance While the substance contains two kinds or more constituents.
2. Pure substances always have the same properties whereas substances have different properties depending on the composition of its constituent components.
Why the mixture of homogeneous Mixture is a mixed substance flat and difficult to separate give an explanation?
BalasHapusThe homogeneous mixture is a mixture consisting of 2 or more ingredients in the same phase
HapusBecause the same phase so difficult to separate