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WorksheetsAtoms, Ions and Isotopes
Total questions: 12
Worksheet time: 7mins
What do we call the green colored particle in this atom?
Proton
Neutron
Electron
What type of energy holds the nucleus of the atom together?
Heat Energy
Kinetic Energy
Nuclear Energy
Atomic Energy
How many neutrons will be in a NEUTRAL atom of Bromine? **Round the mass number to the nearest whole number**
35
45
55
25
Atoms look EXACTLY like Bohr's model of the atom.
True
False
Rutherford's Gold Foil Experiment helped figure out two things about the atom, what were those two things?
Electrons are located outside of the nucleus and the atom is mostly empty space.
The atom has a nucleus that is negatively charged and the protons are located on the outside.
The atom has no charge overall and the protons and electrons always have to be together.
The atom has a positively charged nucleus and the atom is mostly empty space.
The rows on the periodic table are called:
Groups
Atomic numbers
Periods
Mass numbers
A cation is a positively charged ion.
True
False
If I want to make a Phosphorus ion with a -3 charge, how many electrons would I need?
15
16
17
18
The intentional splitting of a nucleus of a heavy and unstable isotope into smaller nuclei is called:
Fission
Fusion
Radiaton
Radioactive Decay
What is the atomic number for Magnesium (Mg)?
12
24.31
Mg
Magnesium
Uranium-235 is an isotope of uranium, how many neutrons does this isotope have? (Uranium is element 92)
140
141
143
145
What percentage of radioactivity do we look for when determining an isotope's half-life?
20%
30%
40%
50%
