Mass Number & Isotopes (AQA A-Level Chemistry): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the atomic number () of an element represent?
What does the atomic number () of an element represent?
Number of protons in the nucleus
What does the mass number () represent?
What does the mass number () represent?
Total protons and neutrons
What are isotopes?
What are isotopes?
Same protons, different neutrons
How many neutrons does Se-79 have if selenium has atomic number 34?
How many neutrons does Se-79 have if selenium has atomic number 34?
45
In a neutral atom, how does the number of electrons compare to protons?
In a neutral atom, how does the number of electrons compare to protons?
They are equal
How many electrons does have if selenium has 34 protons?
How many electrons does have if selenium has 34 protons?
32
How many electrons does have if chlorine has 17 protons?
How many electrons does have if chlorine has 17 protons?
18
Why do isotopes of the same element have the same chemical properties?
Why do isotopes of the same element have the same chemical properties?
Same protons and electrons
How do the physical properties of isotopes compare?
How do the physical properties of isotopes compare?
Different due to different mass
For -35, how many neutrons are present (Cl has )?
For -35, how many neutrons are present (Cl has )?
18