7th STEM: U3/L4 Flashcard: Molecules and Extended Structures

Front

What is the structure of sodium chloride (NaCl) at the atomic level?

Back

In the extended structure of NaCl, atoms are arranged in a cubical pattern.

Front

What type of substances cannot be described as molecules or compounds?

Back

Metals.

Front

Classify the following substances: Quartz (SiO₂), Gold (Au), Nitrogen gas (N₂).

Back

Quartz is a compound, Gold is an atom, and Nitrogen gas is a molecule.

Front

How many different types of atoms are in one molecule of methanol (CH₃OH)?

Back

4.

Front

What type of substance is formed when reactant A and reactant B react?

Back

A compound.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is made up of two or more atoms.

Front

What is the chemical formula for methanol?

Back

CH₃OH.

Front

What is the shape of a sodium chloride crystal?

Back

Cubic.