Definitions
What is an atom?
Lithium has an atomic number of 3, what is its electron configuration?
2 - 1
Name the 3 subatomic particles that make up an atom
Proton, Neutron, electrons
If an atom loses an electron will the atom become a negatively or positively charged ion?
Positively
What is an element?
A chemical substance which properties is determined by its number of protons.
Oxygen has a atomic number of 8, what is its electron configuration?
2-6
What is the middle of the atom called?
The nucleus
The ion would have gained some electrons
What is a molecule?
A group of atoms bonded together.
Cobalt has a atomic number of 27, what is its electron configuration?
2 - 8 - 8 -9
What is the outer shell of an atom called?
Valence shell
What is the difference between an atom and an molecule?
An atom in just singular whilst a molecule could be multiple atoms joined together
What is an isotope?
A atom of a specific element that has a different number of neutrons
Krypton has a atomic number of 36, what is its electron configuration?
2-8-8-18
How many electrons fit in the 4th shell of an atom
32
How do atoms of different elements differ from each other?
Atoms of different elements have different numbers of protons in their nucleus, which gives them their unique properties.
What is an ion?
An atom which has either a negative or positive charge as it has either lost or gained electrons.
Antimony has a atomic number of 51, what is its electron configuration?
2-8-8-32-1
How is the periodic table organised?
The periodic table is organized by increasing atomic number, with elements arranged in periods (rows) and groups (columns) that share similar properties.
Explain why one element may be very reactive and another may not be?
It depends on the number of electrons in the valence shell. If the shell is full the atom is not reactive, if the shell is nearly empty or nearly full it will be highly reactive.