the atom

Question 1

what does the atom consist of?

Answer 1

-2 diff kinds of sub-atomic particles
-protons and neutrons

Question 2

define atomic number

Answer 2

-proton number
-equal to the number of protons in the nucleus

Question 3

define mass number

Answer 3

-nucleon number
-equal to number of protons+ neutons in the nucleus of atoms

Question 4

define isotope

Answer 4

-atoms of the same element
-same number of protons and electrons
-different numbers of neutrons

Question 5

why do isotopes react in same way?

Answer 5

same number of electrons in outer shell

Question 6

what 3 isotopes is hydrogen made from?

Answer 6

-protium
-deuterium
-tritium

Question 7

define relative isotopic mass

Answer 7

-mass of an atom of an isotope
-compared with one-twelfth of the mass of an atom of carbon-12

Question 8

define relative atomic mass

Answer 8

-the weighted mean mass of an atom of an element
-compared with one-twelfth of the mass of an atom of crabon-12

Question 9

what does the weighted mean mass take into account?

Answer 9

-percentage abundance of each isotope
-relative mass of each isotope