What best describes the mass of an electron?
not significant to the overall mass of the atom
What is the atomic number of an oxygen atom with 8 protons and 10 neutrons in the nucleus?
8
Which term is defined as the sum of protons and neutrons in an atom?
mass number
Which term describes atoms with different atomic masses due to varying numbers of neutrons?
isotopes
Which term is defined by the amount of a certain isotope that occurs in a natural sample of an element?
percent abundance
What are protons and neutrons comprised of?
quarks
What are carbon-12, carbon-13, and carbon-14?
different isoptopes of the same element
What is the most basic building block of matter?
the atom
Which part of the atom has a negative charge?
electron
what is a atom?
A atoms is a basic particles of the chemical elements.