Atomic Structure Worksheet
A Grade 11 science worksheet covering fundamental concepts of atomic structure, including subatomic particles, isotopes, and electron configurations.
Includes
Standards
Topics
Atomic Structure Review
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which subatomic particle has a positive charge and is found in the nucleus of an atom?
Electron
Neutron
Proton
Photon
2. Isotopes of an element have the same number of but different numbers of .
protons, electrons
neutrons, protons
protons, neutrons
electrons, neutrons
3. The atomic number of an element is determined by the number of in its nucleus.
4. The mass number of an atom is the sum of its protons and .
5. A neutral atom has an equal number of protons and .
6. Explain the main difference between Bohr's model of the atom and the quantum mechanical model.
7. An atom has 17 protons, 18 neutrons, and 17 electrons. What is its atomic number, mass number, and what element is it?
8. All atoms of a given element have the same mass number.
True
False
9. Electrons are found in fixed orbits around the nucleus.
True
False