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What has no chemical change-each keep its own properties but can be separated?
A mixture is a combination of two or more substances that do not undergo a chemical change and can be separated by physical means. Each component in a mixture retains its original properties.
Is jelly beans a mixture or a compound?
Gum is a mixture because the substances can easily be separated through many different processes
What is the meaning of element?
The meaning of elements is any of the fundamental substances that consist of atoms of only one kind and that singly or in combination constitute all matter.
Can an element be separated into simpler substances or converted into another substance by chemical processes?
no ---------- Elements are atoms, which can be separated into smaller particles such as protons, neutrons, electrons, and quarks, but usually not by chemical processes.
Describe in two ways which a physical combination of sustances is different from a chemical combination of substances?
A physical combination of substances, such as a mixture, retains the individual properties of its components, meaning they can be separated by physical methods like filtration or distillation. In contrast, a chemical combination involves a chemical reaction that alters the properties of the substances involved, resulting in new substances with different characteristics. Additionally, physical combinations do not involve the formation of new bonds, while chemical combinations involve the breaking and forming of bonds between atoms.
Do atoms count as matter?
yes, atoms count as matter because they can be further split into smaller substances.
Do atoms and their combination make up all the substances in the world?
Yes, atoms are the building blocks of all substances in the world. Atoms combine to form molecules, which in turn combine to create different types of substances. This arrangement of atoms and molecules gives rise to the vast diversity of materials and compounds found in nature.
What contains two kinds of atoms that cannot be physically separated?
A compound contains two or more different kinds of atoms that are chemically bonded together in a fixed ratio, and these atoms cannot be physically separated. For example, water (H₂O) consists of two hydrogen atoms and one oxygen atom bonded together. Unlike mixtures, where the individual substances retain their properties and can be separated physically, the atoms in a compound lose their individual characteristics and form a new substance.
What substances can be separated into simpler substances only by chemical means?
A compound can only be separated into elements by chemical means.
Which type of substance can only be separated by a chemical reaction?
A compound can only be separated into its constituent elements by a chemical reaction. In a chemical reaction, the bonds holding the atoms in the compound together are broken, resulting in the formation of new substances.
Explain why elements and compounds are pure substances while a homogeneous mixture is not?
The difference between a homogeneous mixture and a pure substance is that a pure substance has a fixed composition and cannot be separated because it is chemically bonded and a homogeneous mixture can be separated.
Why is sodium chloride a compound and not a mixture of sodium and chlorine?
Sodium chloride is a compound because it is formed by a chemical bond between sodium and chlorine atoms. In a compound, the elements are chemically bonded in fixed proportions, creating a new substance with different properties than its components. A mixture, on the other hand, is a physical combination of substances that can be separated by physical means. Sodium chloride cannot be separated back into its original elements by physical means.
