FLASHCARDS SC.8.P.8.5

Front

How many elements exist?

Back

There are a finite number of elements, currently recognized as 118, with some naturally occurring and others synthesized.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the chemical properties of that element.

Front

How do atoms combine to form compounds?

Back

Atoms combine through chemical bonds, such as ionic and covalent bonds, to form compounds.

Front

What is a compound?

Back

A compound is a substance made of two or more elements chemically bonded together in fixed ratios.

Front

Give an example of a compound essential for living things.

Back

Water (H₂O) is a compound essential for all living organisms.

Front

What makes compounds different from elements?

Back

Elements are pure substances with only one type of atom, while compounds are made of multiple elements chemically combined.

Front

Name a compound found in nonliving things.

Back

Sodium chloride (NaCl), or table salt, is a compound found in nonliving things.

Front

Are compounds made of living or nonliving materials?

Back

Compounds make up both living and nonliving materials in the world.

Front

What happens to atoms during chemical reactions?

Back

During chemical reactions, atoms are rearranged to form new compounds, but they are neither created nor destroyed.

Front

Why is understanding elements and compounds important?

Back

Understanding elements and compounds helps us study the composition of matter and the processes that sustain life and the environment.