Question

true or false 8 there are about 400 known elements 9 all of the elements combine in a variety of ways to make up all living and all nonliving things 10 atoms of the same elements have different properties extra credit (worth up to 4 points) on the back of paper list the 4 things the ancient greeks believed matter was composed of

Explanation:

• For question 8, there are currently 118 known elements, not about 400. So it's false.
• For question 9, elements combine in various ways to form living and non - living things, which is a fundamental concept in chemistry. So it's true.
• For question 10, atoms of the same element have the same chemical properties (isotopes have different physical properties in some cases but same chemical properties mainly). So the statement is false.
• For the extra credit, the Ancient Greeks believed matter was composed of earth, air, fire, and water.

Answer:

1. False
2. True
3. False

Extra Credit: Earth, Air, Fire, Water