Column A:
1. The Ra2+ ion has 88 protons (atomic number of Ra).
2. The Ra2+ ion has 138 neutrons (mass number minus atomic number).
3. The Ra2+ ion has 86 electrons (atomic number minus charge of +2).
Column B:
a. 314
b. 90
c. 86
d. 226
e. 88
f. 138
Matching the values from Column A to Column B:
1. Protons (88) - e. 88
2. Neutrons (138) - f. 138
3. Electrons (86) - c. 86
Column A
1.
How many protons does the Ra2+ ion have? (The atomic number tells you the number of protons)
2.
How many neutrons does the Ra2+ ion have? (Remember: mass number - atomic number = # neutrons)
3.
How many electrons does the Ra2+ ion have? (Remember: if the ion is positive it has lost electrons. To find the number of electrons, take the atomic number and subtract the charge of the ion.)
Column B
a.314
b.90
c.86
d.226
e.88
f.138
1 answer
1 answer