Name ______
Journey Into the Atom – Post Lab
1. Highlight all the NEUTRAL ATOMS yellow.
What do you notice about the numbers of protons and electrons in neutral atoms?
2. Highlight all the ANIONS pink.
What do you notice about the numbers of protons and electrons in anions?
3. Highlight all the CATIONS blue.
What do you notice about the numbers of protons and electrons in cations?
4. The atomic number is ALWAYS equal to the number of ______. In a neutral atom, the atomic number is ALSO equal to the number of ______.
5. Isotopes of an element have the same number of ______but different numbers of ______.
6. The actual mass number is found by adding the number of ______and the number of ______.
Name ______
Journey Into the Atom – Post Lab
1. Highlight all the NEUTRAL ATOMS yellow.
What do you notice about the numbers of protons and electrons in neutral atoms?
2. Highlight all the ANIONS pink.
What do you notice about the numbers of protons and electrons in anions?
3. Highlight all the CATIONS blue.
What do you notice about the numbers of protons and electrons in cations?
4. The atomic number is ALWAYS equal to the number of ______. In a neutral atom, the atomic number is ALSO equal to the number of ______.
5. Isotopes of an element have the same number of ______but different numbers of ______.
6. The actual mass number is found by adding the number of ______and the number of ______.
7. There were FOUR pairs of isotopes in this activity. Name the missing isotope in each:
and ______
and ______
and ______
and ______
8. Fill in the missing numbers in the table:
# protons / #neutrons / Actual mass6 / 8
10 / 21 amu
146 / 238 amu
79 / 118
99 / 252 amu
9. In the Petri dishes, beads were glued to the center of the dish, but the BBs were allowed to roll around. WHY??
10. Evaluate the Petri dish models. In what ways do they illustrate atomic structure well? What are some limitations of the Petri dish models?
11. Why do we care about the structure of atoms?
7. There were FOUR pairs of isotopes in this activity. Name the missing isotope in each:
and ______
and ______
and ______
and ______
8. Fill in the missing numbers in the table:
# protons / #neutrons / Actual mass6 / 8
10 / 21 amu
146 / 238 amu
79 / 118
99 / 252 amu
9. In the Petri dishes, beads were glued to the center of the dish, but the BBs were allowed to roll around. WHY??
10. Evaluate the Petri dish models. In what ways do they illustrate atomic structure well? What are some limitations of the Petri dish models?
11. Why do we care about the structure of atoms?