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Class _____ Aylsham High School Science Year 7 C1: Atoms and the periodic table Contents: Core Knowledge Concept 1: Models of Atoms Concept 2: Atoms, elements, compounds and mixtures Concept 3: Chemical symbols Concept 4: Chemical and physical change Concept 5: Physical and chemical properties of elements Concept 6 :The periodic table
The elements are arranged in a periodic table, which is probably the single most important learning aid in chemistry. It summarizes huge amounts of information about the elements in a way that permits you to predict many of their properties and chemical reactions.
Today’s Periodic Table 7. How are the elements arranged in the modern periodic table? 8. Is the following statement true or false? The periodic law states that when elements are arranged in order of increasing atomic number, there is a periodic repetition of physical and chemical properties. Metals, Nonmetals, and Metalloids 9.
What is happening around us? – C1. Chemical Reactions. Burning. Reacting with metals. Acids and Alkali.
1) Same elements → Molecule of element. e.g., O2, H2, Cl2. Molecular formula. 2) Different elements (definite ratio) → Molecule of compound. e.g., CO, H2O, NH3, CH4. Molecule of compound → All properties of compound. Exception → Inert gases/Noble gases (Single atom) Independent existence.
These free worksheets contain all Important Questions and Answers in Class 7 Chemistry and are based on the newest CBSE NCERT books and syllabus. Click on the links below to obtain the chapter-by-chapter Worksheets for Class 7 Chemistry.
For a fully interactive version with orbitals, isotopes, compounds, and free printouts, visit http://www.ptable.com/.
