Chapter 4 Sec 1 Flashcards
0
Q
Define electrons
A
The negatively charged particles in an atom
1
Q
Define Atom
A
The smallest particle of an element
2
Q
Define nucleus
A
An atom’s positive charge must be clustered in the tiny region in its center called the nucleus
3
Q
Define protons
A
The positively charged particles in an atom
4
Q
Define energy level
A
The specific amount of energy and object has
5
Q
Define neutron
A
The particle in an atom that has no charge
6
Q
Define atomic number
A
The number of protons in the nucleus of an Atom
7
Q
Define isotope
A
Atoms of the same element that have different numbers of the neutrons are called isotopes
8
Q
Define mass number
A
An isotope is defined by its mass number
