Subatomic Particles
Chemistry ⇒ Atomic Structure and the Periodic Table
Subatomic Particles starts at 7 and continues till grade 12.
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See sample questions for grade 7
Describe the role of neutrons in the nucleus.
Describe what happens to the number of electrons when an atom becomes a positive ion.
Explain why atoms are electrically neutral.
If an atom has 11 protons, 12 neutrons, and 11 electrons, what is its mass number?
If an atom has 15 protons, 16 neutrons, and 15 electrons, what is its atomic number?
If an atom has 17 protons, 18 neutrons, and 17 electrons, what is its mass number?
A certain atom has 13 protons, 14 neutrons, and 10 electrons. Is this atom a cation, an anion, or a neutral atom? Explain your answer.
A neutral atom of element Y has a mass number of 31 and contains 15 protons. How many neutrons does it have?
What is the relative charge of an electron? (1) +1 (2) 0 (3) -1 (4) +2
Which of the following best describes the mass of an electron compared to a proton? (1) Much greater (2) About the same (3) Much less (4) Exactly equal
Which of the following is NOT a subatomic particle? (1) Proton (2) Neutron (3) Electron (4) Molecule
Which of the following is true about neutrons? (1) They are positively charged. (2) They are found in the nucleus. (3) They are lighter than electrons. (4) They determine the atomic number.
Electrons are located in the ________ of an atom.
Fill in the blank: The ________ is the center of the atom where protons and neutrons are found.
Fill in the blank: The ________ is the subatomic particle with a negative charge.
Fill in the blank: The ________ of an atom is equal to the number of protons plus the number of neutrons.
True or False: Electrons are found in the nucleus of an atom.
True or False: Neutrons and protons have almost the same mass.
True or False: Protons and electrons have opposite charges.
True or False: The mass of an electron is much smaller than that of a proton.
