Elements, Compounds and Abundant Earth Elements (Flashcard Grade)

Front

What is an element?

Back

A substance that cannot be decomposed into simpler substances by chemical means, made up of the same atoms.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the most abundant element in Earth's crust?

Back

Oxygen.

Front

Which element is the least abundant in Earth's crust?

Back

Calcium.

Front

What is the most abundant element in Earth's atmosphere?

Back

Nitrogen.

Front

What does CHNOPS stand for?

Back

The six elements (Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur) that make up almost all of the weight of an organism.

Front

What element is found in all components of Earth?

Back

Oxygen.

Front

What is the abbreviation for the elements that make up most of living organisms?

Back

CHNOPS.

Front

What is the difference between an atom and an element?

Back

An atom is the smallest unit of matter, while an element is a pure substance made up of only one type of atom.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.