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 9
An atom of carbon has 6 protons, 6 neutrons, and 6 electrons. What is its mass number?
Describe the difference between a cation and an anion in terms of subatomic particles.
Describe the location of protons, neutrons, and electrons in an atom.
Explain why atoms are electrically neutral.
An atom of carbon has 6 protons, 6 neutrons, and 6 electrons. What is its mass number?
If an atom has 15 protons, 16 neutrons, and 18 electrons, what is its charge and mass number?
If an atom has 17 protons, 18 neutrons, and 17 electrons, what is its mass number?
If an atom has 8 protons, 8 neutrons, and 10 electrons, what is its overall charge?
What is the relative mass of a neutron compared to a proton? (1) About the same (2) Much less (3) Much more (4) Zero
Which of the following is NOT a subatomic particle? (1) Proton (2) Neutron (3) Electron (4) Molecule
Which of the following is the correct symbol for a proton? (1) p+ (2) n0 (3) e- (4) p-
Which of the following is true about electrons? (1) They are positively charged. (2) They are found in the nucleus. (3) They have a negligible mass. (4) They determine the mass number.
Fill in the blank: The ________ and ________ contribute most to the mass of an atom.
Fill in the blank: The ________ are found in energy levels or shells around the nucleus.
Fill in the blank: The ________ is the subatomic particle that defines the atomic number of an element.
Fill in the blank: The ________ is the subatomic particle that is lost or gained when an atom becomes an ion.
State whether the following statement is true or false: The mass of an electron is much smaller than that of a proton.
True or False: Electrons are found in the nucleus of an atom.
True or False: Neutrons are found outside the nucleus.
True or False: The electron has a mass of approximately 1 atomic mass unit (amu).
