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1) The document provides scientific terms and their definitions related to matter, properties of substances, and changes of state. #Science prep 1 ##First term #Unit 1 Lesson 3

: Symbols of elements, atomic number (protons), and mass number (protons + neutrons). 1) The document provides scientific terms and their

: Understanding mass, volume, and density ( Essential Practice Problems Density Calculations : Problem :

You can find dedicated revision sheets and practice exams on these educational platforms: Science Prep 1 First Term Revision | PDF - Scribd properties of substances

Problem : Identify the number of protons and neutrons for Sodium ( :

: How atoms combine to form molecules and the distribution of electrons in energy levels. Essential Practice Problems Density Calculations : Problem : A piece of iron has a mass of 78g and a volume of . Calculate its density. Scientific Terms : "The mass of unit volume of a substance" (Answer: Density ).