EL 1- Where do the chemical elements come from?

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Created by: Megan2413
Created on: 14-07-17 19:19

What is the definition of an isotope?

Atoms of the same element except they have different mass numbers due to the different number of neutrons

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What is the relative atomic mass made up of?

The average mass of several isotopes of an element combined according the abundance of each one

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What is mass spectrometry used for?

To find the relative atomic mass of elements and compounds

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How does a mass spectrometer find the relative atomic mass?

Sample atoms or molecules are ionised to form cations that are separated according to their mass to charge ratios (m/z) so that the separate ions and their relative abundances can be detected

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What is the formula for calculating relative atomic mass using mass spectrometry?

Relative atomic mass = (mass x abundance of ion 1) + (mass x abundance of ion 2)/100

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From a graph created using mass spectrometry- what is on each axis?

x axis- m/z ratio y axis- intensity % or relative abundance %

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What is nucelar fusion?

When two light nuclei fuse together under high temperatures and pressures forming a single heavier nucleus of a new element, releasing enourmous quantities of energy

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Why can nucelar fusion not occur naturally on Earth?

The two nuceli would repel each other too much to fuse

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Other cards in this set

Card 2

Front

What is the relative atomic mass made up of?

Back

The average mass of several isotopes of an element combined according the abundance of each one

Card 3

Front

What is mass spectrometry used for?

Back

Card 4

Front

How does a mass spectrometer find the relative atomic mass?

Back

Card 5

Front

What is the formula for calculating relative atomic mass using mass spectrometry?

Back

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EL 1- Where do the chemical elements come from?