Periodic table Flashcards
1
Q
sub-atomic particles
A
electrons, protons, neutrons
2
Q
first four elements
A
Hydrogen, Helium, Lithium, Beryllium
3
Q
elements 5-8
A
Boron B, Carbon C, Nitrogen N (89% of air), Oxygen O (18% in air)
4
Q
charged particles
A
neutron neutral
electron negative
protons positive
5
Q
Atomic number
A
bottom number - below the chemical name
number of protons in the nucleus
6
Q
which two particles are in the nucleus
A
protons and neutrons
7
Q
where are the electrons
A
outside, around the nucleus
8
Q
opposites attract
A
electrons -ve and protons +ve
9
Q
elements 9 - 12
A
fluorine F (toothpaste), neon Ne (lights), sodium Na (natrium/salt), magnesium Mg
10
Q
elements 1-4
A
Hydrogen (H), Helium (He), lithium (Li), berylium (Be)
