Piero Flashcards
1
Q
Atom
A
Smallest unit of matter that has the properties of an element
2
Q
Protons
A
Positively charge subatomic particles in the nucleus
3
Q
Neutron
A
Neutral subatomic particle in the nucleus
4
Q
Electron
A
Negatively charges subatomic particle outside the nucleus
5
Q
Nucleus
A
The center of an atom has protons plus neutrons
6
Q
Atomic number
A
The numbers of protons identifies and atom
7
Q
Mass number
A
Number of protons plus number of neutrons
8
Q
Group
A
Column on the periodic table has the same number of valence electrons
9
Q
Period
A
Row on the periodic table, violence, electrons electrons in the outermost energy shell they determine reactivity
