Which of the statements accurately describes elements?

Question

1.) They combine chemically to form new substances; they are "building blocks of matter".

2.) They can be broken down by physical means.

3.) They cannot be broken down by chemical means.

4.) They are chemical combinations of simpler forms of matter.

5.) They are pure substances.

Answer 1

1.) They combine chemically to form new substances; they are "building blocks of matter".

2.) They can be broken down by physical means.

3.) They cannot be broken down by chemical means.

5.) They are pure substances.