Atomic structure Flashcards
electron proton neutron (keywords)
1
Q
What is an atom?
A
A tiny particle that all substances are made of.
2
Q
How do you find the atomic mass number?
A
Number of neutrons + protons
3
Q
What charge is proton, neutron and electron?
A
proton = positive neutron = equal/same charge electron = negative
4
Q
In an atomic shell how many electrons are allowed in each shell (3) ?
A
1st shell = 2
2nd shell = 8
3rd shell = 8
5
Q
23
Na Which one is the atomic or mass
11 number ?
A
23 - mass number
11 - atomic number
6
Q
23
Na Which number tells us the number
11 of electrons ?
A
11
7
Q
If sodium has 11 electrons, what is its electronic configuration ?
A
2 8 1
