Physical Science

Consider the following substances: C90; NaCℓ; CO2; Fe; H2O 2.1 Write down a substance from the list above that is the following: 2.1.1 A molecular structure (1) 2.1.2 A metallic structure (1) 2.1.3 A covalent network structure (1) 2.1.4 An ionic network structure (1) 2.2 Draw the Lewis dot diagram for the CO2 molecule. (2) … Read more

Various options are provided as possible answers to the following questions. Eachquestion has only ONE correct answer. Choose the answer and write only theletter (A–D) next to the question number (1.1–1.10) in the ANSWER BOOK, forexample 1.11 E. 1.1 Air can be classified as a/an …A element.B compound.C homogenous mixture. D heterogeneous mixture. (2) 1.2 … Read more