Write true if the statement is true. If the statement is false, change the under

Question

Write true if the statement is true. If the statement is false, change the underlined terms to make the statement true. Write your answers in the spaces provided. ______________ 1. All atoms of the same element have the same atomic mass. _____________ 2. Two important isotopes of uranium are U-235 and U-200. _____________ 3. Atoms of the same element that have different atomic masses are called isotopes. _________________ 4. Three isotopes of nitrogen are protium, deuterium, and tritium. _______________ 5. The periodic table gives the average of the atomic masses of all the isotopes of an element. _____________ 6. The atomic number of an element never changes. ________________ 7. An atom of hydrogen-2 has two neutrons. ____________ 8. On the periodic table, an element's atomic mass is not a whole number. _______________ 9. Isotopes of an atom of an element have the same number of neutrons. ___________________10. All elements have two or more isotopes.

Explanation / Answer

1.false.......Atomic number

2.false.......U235 and U238

3.False.......Mass number

4.false......hydrogen

5.true

6.true

7.false.....1

8.true

9.false.....different

10.true

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