Questions molecules and extended structure

What is a pure substance?

• A group of atoms that are held together by chemical bonds

• A substance made up of atoms of two or more different elements joined by chemical bonds

• A solid whose atoms, ions, or molecules are arranged in a regular, repeating pattern

• A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

What defines a molecule?

• The smallest unit of a compound that keeps all the properties of that substance

• The attractive force that holds atoms or subunits of atoms together

• A solid whose atoms, ions, or molecules are arranged in a regular, repeating pattern

• A sample of matter with definite chemical and physical properties

What is a chemical bond?

• A solid whose atoms, ions, or molecules are arranged in a regular, repeating pattern

• The smallest unit of a compound that keeps all the properties of that substance

• The attractive force that holds atoms or subunits of atoms together

• A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

What is a compound?

• A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

• A group of atoms that are held together by chemical bonds

• A substance made up of atoms of two or more different elements joined by chemical bonds

• A solid whose atoms, ions, or molecules are arranged in a regular, repeating pattern

What is a crystal?

• The smallest unit of a compound that keeps all the properties of that substance

• The attractive force that holds atoms or subunits of atoms together

• A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

• A solid whose atoms, ions, or molecules are arranged in a regular, repeating pattern

What are both samples of white and red phosphorus made up of?

• Different elements

• Only phosphorus atoms

• Only oxygen atoms

• A mixture of various compounds

Which form of phosphorus is very unstable?

• Red phosphorus

• White phosphorus

• Both white and red phosphorus

• Neither white nor red phosphorus

Is red phosphorus unstable?

• Yes, it is very unstable

• No, it is not unstable

• It is only unstable under high pressure

• It is only unstable at high temperatures

What is a pure substance?

• A mixture of different types of matter

• A sample of matter that has varying chemical and physical properties

• A sample of matter that has specific chemical and physical properties

• A compound made of two or more elements

Are pure substances mixtures?

• Yes, they are mixtures

• No, they are not mixtures

• Yes, but only in a solid state

• No, but they can become mixtures under high pressure