Elements and Compounds

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means and is represented by a unique chemical symbol.

Front

What is a compound?

Back

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

Tags

NGSS.MS-PS1-1

Front

How are elements represented in the periodic table?

Back

Elements are represented by unique one or two-letter chemical symbols.

Front

What is the difference between an element and a compound?

Back

An element consists of only one type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

Front

Can compounds be broken down into simpler substances?

Back

Yes, compounds can be broken down into their constituent elements through chemical reactions.

Tags

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Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter notation used to represent an element.

Front

Give an example of an element and its chemical symbol.

Back

An example of an element is Oxygen, which is represented by the chemical symbol 'O'.

Front

Give an example of a compound and its chemical formula.

Back

An example of a compound is Water, which has the chemical formula H2O.

Tags

NGSS.MS-PS1-1

Front

What does it mean for a compound to be composed of at least two different elements?

Back

It means that a compound must contain atoms of at least two different types of elements that are chemically bonded together.

Tags

NGSS.MS-PS1-1

Front

What is the significance of the chemical formula of a compound?

Back

The chemical formula of a compound indicates the types and numbers of atoms present in the compound.

Tags

NGSS.MS-PS1-1