Principles of chemistry 1c Flashcards
1
Q
Atom
A
A particle that can’t be broken down into smaller particles
2
Q
Molecule
A
Two or more atoms chemically joined together ( can be identical atoms or different ones)
3
Q
Protons
A
Protons are found in the nucleus of an atom. They have a positive charge (+1) and have the same mass as a neutron. It has a mass of 1
4
Q
Neutrons
A
It is in the nucleus, has a neutral charge (0). A mass of 1
5
Q
Electrons
A
In shells around the nucleus. A negative charge ( -1) and a mass of 1/1836. Are in constant motions within their orbit
6
Q
Atomic number
A
Number of protons
7
Q
Mass number
A
Number of protons + number of neutrons
8
Q
Isotope
A
Atoms of the same number of protons but different numbers of neutrons
