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Compounds
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- In chemistry, we refer to these as compounds, which we define as a substance that results from the combination of two or more elements in a constant ratio.
Compounds require chemical means to separate them into elements and/or simpler compounds. Sodium chloride, also known as table salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions.
- Chemical Formulas
A chemical formula is an expression that shows the elements...
- Chemical Formulas
All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms. For example, all helium atoms have two protons, and no other elements have atoms with two protons.
Jul 20, 2022 · This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same thing with a fixed, definite set of properties. If we take two or more pure substances and mix them together, we refer to this as a mixture.
Jun 19, 2021 · The proton remember is the sub atomic particle in the nucleus and any atoms with the same number of protons are the same element. For example if I have a group of atoms which all have 6 protons, if I look in the periodic table I would see it would be the element Carbon.
- Chemical Substances
- Chemical Mixtures
- Heterogenous Mixtures
- Homogenous Mixtures
In chemistry, a chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components without breaking chemical bonds. Chemical substances can be solids, liquids, gases, or plasma. Changes in temperature or pressure can cause substances to shift between the different phas...
A mixture is a material system made up of two or more different substances, which are mixed but not combined chemically. A mixture refers to the physical combination of two or more substances in which the identities of the individual substances are retained. Mixtures take the form of alloys, solutions, suspensions, and colloids.
A heterogeneous mixture is a mixture of two or more chemical substances (elements or compounds) where the different components can be visually distinguished and easily separated by physical means. Examples include: 1. mixtures of sand and water 2. mixtures of sand and iron filings 3. a conglomerate rock 4. water and oil 5. a salad 6. trail mix 7. m...
A homogeneous mixture is a mixture of two or more chemical substances (elements or compounds) where the different components cannot be visually distinguished. Often separating the components of a homogeneous mixture is more challenging than separating the components of a heterogeneous mixture. Distinguishing between homogeneous and heterogeneous mi...
Sep 6, 2023 · Atoms of a single element share the same atomic number, which means they have the same number of protons in the atomic nucleus. For example, hydrogen has an atomic number of 1, helium has an atomic number of 2, and so on. The atomic number uniquely identifies an element.
People also ask
What is the difference between a proton and a compound?
Which atom has the same number of protons?
What is the number of protons in an atom called?
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Are two atoms of the same element the same?
The law of constant composition states that the ratio by mass of the elements in a chemical compound is always the same, regardless of the source of the compound. The law of constant composition can be used to distinguish between compounds and mixtures of elements: Compounds have a constant composition; mixtures do not.
