WorksheetsAtomic structure
Total questions: 18
Worksheet time: 10mins
The smallest unit of ordinary matter that forms a chemical element.
Molecule
Atom
Proton
Electron
Electrons, protons and neutrons
Three basic particles of an atom
Three basic particles of a molecule
Three strange words
Three electronic devices
More than 99.94% of an atom's mass is in
the protons
the neutrons
the electrons
the nucleus
Fixed distances from the nucleus of an atom where electrons may be found
Shells
Valence electrons
Orbits
None of the above
When electrons go from upper energy level to lower energy level, they ...
Emit energy
Absorb energy
Do nothing
None of these
The charge of a neutron is
1.6*10^-19 C
-1.6*10^-19 C
0
The charge of an electron is
1.6*10^-19 C
-1.6*10^-19 C
0
The total number of protons and neutrons
A - Atomic number
A - Nucleon number
A - Mass number
A - Neutron number
The same number of protons but different numbers of neutrons in each atom
Electrons
Protons
Nucleai
Isotopes
