Atoms Flashcards
Learn about atoms
1
Q
Atoms
A
Atoms are the smallest units of matter.
2
Q
Matter
A
Anything that takes up space and mass
3
Q
Element
A
Substances that have one type of atom
4
Q
Atomic structure (what atoms are made of)
A
Proton (+)
Neutron (o)
Electron (-)
5
Q
Negative charged particles of atoms are called:
A
Electrons
6
Q
Atomic number
A
Number of protons in the nucleus
7
Q
Atomic mass
A
Number of mass of the nucleus
(Protons+Neutrons=Mass number)
8
Q
Valence Electrons
A
Electrons found in the outer shell
9
Q
How many electrons does the first shell hold?
A
Holds up to 2.
10
Q
How many electrons does the second shell hold?
A
No more and up to 8.
