NEB NotesNepal
Unit 9 • Class 7Science and Technology (Sci.071)

Unit 9: Matter (पदार्थ)

एकाइ ९: पदार्थ

Three states of matter (solid, liquid, gas), particulate theory of matter, elements, compounds, mixtures, symbols and valency of first 20 elements, and chemical formulas (p. 268-297).