SC3c - Isotopes Flashcards Preview

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Flashcards in SC3c - Isotopes Deck (9)
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1
Q

What is an isotope?

A

The same element that has a different mass

2
Q

What do atoms of an isotope have?

A

The same number of protons and electrons but different numbers of neutrons hence the different mass

3
Q

What is relative atomic mass?

A

The relative mass of the isotopes in an element

4
Q

What are the two isotopes of chlorine?

A
  1. 37
    Cl. And Cl
  2. 17
5
Q

When are isotopes describes as being stable?

A

If the ratio of protons to neutrons is correct

6
Q

What are two uses of stable isotopes?

A

Water and soil management and forensics

7
Q

What element on the periodic table has the greatest number of stable isotopes?

A

Tin with 10 stable isotopes

8
Q

How do we measure the mass of an atom?

A

Relative to that of carbon -12 because the masses are so small

9
Q

How do you calculate the relative atomic mass if given abundance of the isotopes if you take 100 atoms?

A

(% of isotope 1 x mass of isotope 1 ) + (the percentage of isotope 2 x mass of isotope 2) divided by 100