The nuclear atom - isotopes

Question 1

Isotope definition

Answer 1

Different atoms of the same element that contain the same number of protons and electrons but a different number of neutrons.
Different mass number (A), but same atomic number (Z).

Question 2

What are the isotopes of hydrogen?

Answer 2

Protium: 0 neutrons, 1,1H
Deuterium: 1 neutron, 2,1H
Tritium: 2 neutrons, 3,1H

Question 3

How do the properties of an isotope compare to the regular element?

Answer 3

Identical chemical properties, physical properties differ.

Question 4

Relative atomic mass definition

Answer 4

The average mass of one atom of an element compared to one twelfth of the mass of an atom of carbon-12.

Question 5

Natural abundance of an isotope definition

Answer 5

The percentage of its atoms among all atoms of the given element found on our planet.

Question 6

How are relative atomic mass and isotopes linked?

Answer 6

Ar = the weighted average of all isotopes of an element
This is the reason why it is not a whole number.

Question 7

Relative atomic mass formula

Answer 7

Ar = (% abundance A x mass A) + (% abundance B x mass B) / 100