atomic structure and isotopes

Question 1

what is deuterium?

Answer 1

hydrogen with an extra neutron, therefore an atomic mass of 2

Question 2

what is tritium?

Answer 2

hydrogen with an extra 2 neutrons, therefore an atomic mass of 3

Question 3

what is the mass of an electron?

Answer 3

1/1840

Question 4

what type of attraction holds electrons in their shells?

Answer 4

electrostatic

Question 5

what is a nuclide?

Answer 5

a term used to describe any atom with its atomic number and mass number specified

Question 6

what is an isoelectronic pair?

Answer 6

atoms or ions with the same number of electrons

Question 7

what is relative atomic mass?

Answer 7

the relative atomic mass (Ar) for an element is the weighted mean mass of an atom compared with 1/12th mass of an atom of carbon-12.

Question 8

what is the relative isotopic mass?

Answer 8

the relative isotopic mass for an isotope is the mass of an isotope compared with 1/12th mass of an atom of carbon-12