atomic mass and number

Question 1

atomic number-

Answer 1

number of protons found in a certain atom; distinguishes one element from another.

Question 2

atomic mass-

Answer 2

calculated mean of the mass number (protons and neutrons) for element’s isotopes

Question 3

isotope-

Answer 3

one or more forms of an element that have a different number of neutrons; will be negative or positive

Question 4

protons _____ electrons

Answer 4

equal

Question 5

mass-

Answer 5

amount of substance. (electrons are not counted because they don’t weigh enough)

Question 6

isotopes can be _________, they are ________ and produce ________ as the nucleus dissolves

Answer 6

radioactive, stable, radiation