Question

place a t for true or an f for false on the blank for each of the following statements. change the underlined word or phrase in each false statement to make it true. write your correction on the blank.
______ 1. the ancient greeks believed that matter is made of four basic elements: earth, air, fire, and oxygen.
______ 2. the man who proposed the first modern atomic theory of matter was antoine lavoisier.
______ 3. the law of definite proportions says that the composition of a compound is always the same.
______ 4. in science, a prediction that can be tested is known as a theory.
______ 5. the tiny negatively charged particles discovered by j.j. thomson in 1897 were electrons.
______ 6. the number of protons in an atom is always equal to the number of neutrons.
______ 7. isotopes differ from one another in their chemical properties.
______ 8. rutherford’s gold foil experiment led to the discovery of the portion of the atom known as the nucleus.
*______ 9. the largest portion of an atom is taken up by the nucleus.
______ 10. the mass number of an atom is equal to the total number of protons and neutrons.
______ 11. scientists use the symbol g to represent the atomic mass unit.
______ 12. an atomic mass unit is about equal to the mass of one proton.

Explanation:

1.

Los griegos antiguos creían que la materia estaba hecha de tierra, aire, fuego y agua, no oxígeno.

La primera teoría atómica moderna fue propuesta por John Dalton, no Antoine Lavoisier.

La ley de proporciones definidas establece que la composición de un compuesto es siempre la misma.

Answer:

F; Correct: water

2.