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.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Atomic Number and Mass Number.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A neutral atom has 13 electrons. What is its atomic number?
An atom has 15 protons, 16 neutrons, and 15 electrons. What is its mass number?
An atom has a mass number of 40 and contains 18 protons. How many neutrons does it have?
An atom of chlorine has 17 protons and 18 neutrons. What is its atomic number and mass number?
An atom of element X has 20 protons and 22 neutrons. Write its atomic number and mass number.
An atom of sodium has 11 protons and 12 neutrons. What is its mass number?
Describe the relationship between atomic number, mass number, and the number of neutrons in an atom.
Explain why isotopes of the same element have different mass numbers but the same atomic number.
Explain why the atomic number is always a whole number, but the relative atomic mass is often a decimal.
If an atom has 7 protons, 7 neutrons, and 7 electrons, what is its mass number?
If an atom has an atomic number of 8 and a mass number of 18, how many neutrons does it have?
State the formula to calculate the number of neutrons in an atom.
What does the atomic number of an element represent?
