Atoms and Isotopes (HSC SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What percentage of an atom's mass is contained in the nucleus?
What percentage of an atom's mass is contained in the nucleus?
Over 99.95%
What is the relative mass of an electron?
What is the relative mass of an electron?
What does the atomic number (Z) of an element represent?
What does the atomic number (Z) of an element represent?
Number of protons
An atom has atomic number 11 and mass number 23. How many neutrons does it have?
An atom has atomic number 11 and mass number 23. How many neutrons does it have?
12
What are isotopes?
What are isotopes?
Same element, different neutrons
How many neutrons are in chlorine-37 ()?
How many neutrons are in chlorine-37 ()?
20
What is an alpha particle?
What is an alpha particle?
Helium nucleus
Which radiation has the highest penetrating power?
Which radiation has the highest penetrating power?
Gamma rays
When undergoes alpha decay, what is the atomic number of the product?
When undergoes alpha decay, what is the atomic number of the product?
90
Iodine-131 has an 8-day half-life. How much remains from 1.0 g after 16 days?
Iodine-131 has an 8-day half-life. How much remains from 1.0 g after 16 days?
0.25 g