SECTION T A. Name the following. 1 The term for elements with atomicity 3 2 Particles formed by combination of atoms in fixed proportion 3. A chemical added to speed up the process of sedimentation 4. A representation of an atom of an element, or the element itself 5. Separating insoluble solid components suspended in a liquid using a filter B. Choose the correct option. 1. Which of the following is not a diatomic element? a. Oxygen 2. Which of the following is a monovalent metal? b. Helium c. Nitrogen d. Chlorine a. Oxygen 3. Symbol of which of the following metal is not derived from its Latin name? b. Magnesium C. Carbon d. Sodium a. Manganese 4. Which of the following statement is incorrect about a mixture? a. The constituents of a mixture can be separated easily. b. Iron C. Lead d. Copper b. The constituent particles retain their chemical properties in a mixture. C. The composition of a mixture varies. d. A mixture is formed when two or more substances combine chemically. 5. Maize seeds can be separated out from wheat flour by b. Evaporation c. Sieving d. Magnetic separatic a. Filtration C. Write T for true and F for false. Correct the false statement(s). 1. Water and carbon dioxide combined in a cold drink form a mixture.

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Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.