Term
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Definition
| Chemistry deals with the structure, properties and reactions of matter |
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Term
| Identify the difference between elements, compounds and mixtures in terms of the particle theory. |
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Definition
| elements insist of one kind of atom only, compounds are 2 or more different elements chemically bonded together and a mixture is 2 or more different elements or compounds physically interacted . |
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Term
| What are homogeneous and heterogeneous substances? |
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Definition
Homogeneous substances- has the same type and distribution of particles throughout the definite composition
Heterogeneous Substances- are not the same in composition and properties |
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Term
| What are the State of Matter |
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Definition
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Term
| What is the difference between physical and chemical properties of elements, compounds and mixtures? |
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Definition
Physical properties of something are readily observation.
Chemical properties are the chemical reactions. |
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Term
| Describe atoms in terms of mass number and atomic number |
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Definition
| The weight of an Atom is found in the mass number and is the number of protons and neutrons together. The atomic number is the number of protons and the number of electrons found in the shells. The amount of neutrons is found by taken the mass number away from the atomic number. |
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Term
| Some trends in the periodic table. |
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Definition
- moving across the period the is a decrease in atomic radius
-An increase in ionisation across each period.
-Across period there is an increase in electrongrativity , down a group a decrease
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