Nitrogen And Aluminum

Which of the following is NOT a property of metals?

• Ductile

• Brittle

• Malleable

• Lsutrous

What is the main source of metallic and non-metallic minerals?

• Oceans

• Earth

• Atmosphere

• Sunlight

Which of the following is an example of a metallic mineral?

• Diamond

• Mica

• Hematite

• Gravel

What are natural resources?

• Resources created by humans

• Resources that exist without human actions

• Only metallic minerals

• Only fossil fuels

What is the tendency of metals in chemical reactions?

• Gain electrons

• Lose electrons

• Form acidic oxides

• Always act as oxidizing agents

The reactivity series of metals is arranged in:

• Increasing atomic number

• Decreasing density

• Decreasing reactivity

• Increasing malleability

Which of the following metals exist in a free state in nature?

• Sodium

• Potassium

• Silver

• Magnesium

What is metallurgy?

• Study of minerals

• Science of extracting metals from ores

• Process of refining non-metals

• Study of gases in air

Which of the following is NOT a step in metal extraction?

• Concentration of ore

• Production of the metal

• Purification of the metal

• Melting the metal

What is the main ore of aluminum?

• Hematite

• Malachite

• Bauxite

• Galena