Atoms Flashcards
1
Q
What are atoms made up of?
A
subatomic particles
2
Q
What are subatomic particles?
A
- protons
- electrons
- neutrons
3
Q
Which subatomic particles are in the nucleus?
A
protons and neutrons
4
Q
How do electrons travel?
A
orbit in shells
5
Q
What is relative atomic mass?
A
the mass of an atom compared to the mass of a 12th of a Carbon 12 atom
6
Q
Relative charges of subatomic particles
A
P = + 1 E = - 1 N = 0
7
Q
Relative mass of subatomic particles
A
P = 1 E = 1/1800 N = 1
8
Q
What is atomic number?
A
number of protons
9
Q
What is mass number?
A
number of protons and neutrons
10
Q
What is an isotope?
A
atom with same number of protons but different number of neutroons
11
Q
How is periodic table arranged?
A
in order of atomic number
12
Q
Electronic configuration of first twenty elements
A
2,8,8,2
