Chemical World Flashcards
Atoms are defined as the?
Smallest particles of a substance
Atoms are composed even smaller?
Particles (subatomic particles)
Subatomic particles are called?
Protons, neutrons and electrons
The number of protons equals?
The number of electrons in an atom (atomic number)
The number of protons plus the number of neutrons add up to give?
The atoms weight (mass number or atomic mass)
Protons are positively charged particles located?
In the nucleus of the atom
Neutrons are located?
In the nucleus of the atom
Neutrons are?
Neutral (do not have charge)
Electrons are negatively charged particles located?
On the outside of the nucleus
Protons and neutrons are?
Roughly the same size as each other
Electrons are a smaller than?
Protons and neutrons
The number of protons equals the number of electrons?
In an Atom
The number of protons and neutrons add up to give?
The atoms weight
The rules for electron shell filling are?
Two electrons - first shell
Eight electrons - second shell
Eighteen electrons - third shell
Up to 32 electrons in the fourth shell
The periodic table is used to organise?
All the known chemical elements
