Chapter 4 Vocab Flashcards
1
Q
Atom
A
Smallest particle of an element that retains all the properties of that element
2
Q
Atomic mass
A
Weighted average mass of the isotopes of that element
3
Q
Dalton’s atomic theory
A
States that matter is composed of extremely small particles called atoms
4
Q
Electrons
A
Negatively charged
5
Q
Isotope
A
Atoms of the same element with different numbers of neutrons
6
Q
Mass number
A
Number after an elements name; sum of protons and neutrons
7
Q
Neutron
A
Neutral, subatomic particles in an atoms nuclear that has a mass nearly equal to that of a proton
8
Q
Nucleus
A
Extremely small, positively charged, dense center of an atom that contains protons and neutrons
9
Q
Atomic number
A
Number of protons in an atom
10
Q
Proton
A
Positively charged
