Atomic Number and Mass Number
Chemistry ⇒ Atomic Structure and the Periodic Table
Atomic Number and Mass Number starts at 7 and continues till grade 12.
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See sample questions for grade 7
Describe how you would find the number of neutrons in an atom if you know its atomic number and mass number.
Explain why isotopes of the same element have different mass numbers but the same atomic number.
What is the atomic number of an element?
What is the difference between atomic number and mass number?
An atom has 16 protons and 16 neutrons. What is its mass number?
An atom has 2 protons, 2 neutrons, and 2 electrons. What is its atomic number and mass number?
An atom has an atomic number of 7 and a mass number of 15. How many neutrons does it have?
An atom of chlorine has 17 protons and 18 neutrons. What is its mass number?
Which of the following best describes the mass number? (1) Number of protons (2) Number of neutrons (3) Number of protons plus neutrons (4) Number of electrons plus protons
Which of the following elements has an atomic number of 8? (1) Nitrogen (2) Oxygen (3) Fluorine (4) Neon
Which of the following elements has the highest atomic number? (1) Hydrogen (2) Helium (3) Lithium (4) Beryllium
Which of the following is NOT needed to calculate the mass number of an atom? (1) Number of protons (2) Number of neutrons (3) Number of electrons (4) Both 2 and 3
Fill in the blank: The atomic number is represented by the symbol ______.
Fill in the blank: The mass number is represented by the symbol ______.
Fill in the blank: The number of neutrons in an atom is equal to ______ minus ______.
The atomic number of an element is also called its ______ number.
Isotopes of an element have the same atomic number but different mass numbers. True or False?
True or False: The atomic number is always a whole number.
True or False: The atomic number of an atom can never change during a chemical reaction.
True or False: The atomic number of an element is always equal to the number of electrons in a neutral atom.
