CHEMISTRY EXAM PAPERT #1 FINAL EXAM WITH CORRECT ANSWERS

Matter - Answer-anything that occupies space and has mass mass - Answer-the amount of matter in an object pure substance - Answer-elements and compounds that cannot be broken down mixtures - Answer-combinations of two or more substances that can be separated or physically mixed heterogeneous mixture - Answer-non uniform composition ex: trail mix homogeneous mixture - Answer-uniform composition ex: salt water qualitative data - Answer-physical characteristics quantitative data - Answer-measure and calculate (numbers) Atom - Answer-smallest particle of an element that retains all the chemical properties of the element Nucleus - Answer-center of atom protons - Answer-positively charged particles neutrons - Answer-neutral charged particles electrons - Answer-negatively charged particles electron cloud - Answer-the space where all the electrons are held elements - Answer-are pure substances that cannot be broken apart by ordinary means to other substances molecule - Answer-consists of two or more atoms, either of the same type of element or those of different elements, in a definite ratio molecular formula - Answer-molecules are represented by this symbolic formula compounds - Answer-pure substances containing different elements in a definite ratio held together by chemical bonds