Isotopes

Question 1

What are isotopes

Answer 1

They are atoms that have the same number of protons but different numbers of neutrons in their nuclei

Question 2

What is the atomic number

Answer 2

The number of protons found in the nucleus of an atom. All atoms have the same number of protons in their nuclei

Question 3

What is the relative atomic mass

Answer 3

This is the relative mass of an atom compared to all the other atoms in the periodic table. Its a ration and has no unit

Question 4

What is the mass number

Answer 4

This is the relative mass of atoms. Its calculating from adding the number of protons (Ar=1) to the number of neutrons (Ar=1). Electrons a regarded as having amass of zero.

Question 5

How do you calculate the average atomic mass from given isotopic abundances

Answer 5

(Mass of isotopes 1 x %abundances) + (Mass of isotopes 2 x %abundances) +(Mass of isotopes 3 x %abundances)
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100