Question

question #9 a physical property is a characteristic of matter that can be observed or measured without changing the identity of the matter. why is irons tendency to rust not a physical property? a a new substance with new properties forms when iron rusts. b iron is magnetic. c it cannot be observed. d the identity of iron remains unchanged when it rusts. question #10 most elements on the periodic table are____. some of their properties include: malleability, ductility, shiny, solid at room temperature. a non - metals b metals c mettaloids d non - polar compounds question #11 what is a property of mettaloids? a weak conductors/ semi - conductors b solids c on the left of the periodic table d brittle

Explanation:

• Question #9: Physical properties can be observed without changing the matter's identity. Rusting of iron is a chemical change as iron reacts with oxygen to form iron oxide (rust), a new substance with different properties. So, iron's tendency to rust is a chemical property, not physical.
• Question #10: Metals on the periodic - table have properties such as malleability, ductility, being shiny, and solid at room temperature.
• Question #11: Metalloids are weak conductors or semi - conductors, which is a characteristic property that sets them apart from metals and non - metals.

Answer:

• Question #9: A. A new substance with new properties forms when iron rusts.
• Question #10: B. Metals
• Question #11: A. Weak Conductors/ Semi - conductors