The Atom Flashcards
Why does an atom have no charge?
As an atom contains equal numbers of positive protons and negative electrons which cancel each other out
Name all parts of the atom.
The nucleus -protons -Neutrons Electrons Shells/orbitals
What is the mass and charge of a proton
Mass- 1
Charge- +1
What is the mass and charge of a neutron?
Mass- 1
Charge- 0
What is the mass and charge of an electron?
Mass- negligible
Charge- -1
Give a definition for an element.
An element is a substance made up of only 1 type of atom
Give a definition of a compound.
A compound is a substance that is made up of 2 or more different types of atoms chemically bonded together
Give the definition of a mixture.
A mixture is a substance that’s is made up of 2 or more different types of atoms not chemically bonded together
What & where is the mass number?
The mass number is the number of protons plus the number of neutrons in the nucleus of an atom.
It is the top number next to the symbol.
Where and what is the atomic number?
The atomic number is the number of protons in the nucleus of an atom ( also number of electrons)
It is the lower number next to the symbol
How do you calculate the number of neutrons?
You take away the atomic number from the mass number.
Mass-atomic
What is the symbol, atomic, mass number & number of neutrons of magnesium-24,12? Lithium7,3?
Argon40,18? Aluminium27,13?
Mg- 12. 24. 12
Li- 3. 7. 4
Ar- 18. 40. 22
Al- 13. 27. 14
When are atoms the most happiest?
When they have a full outer shell
What is the electronic structure of boron when it has 5 protons? Chlorine-17? Calcium-20? Oxygen-8?
B- 2,5
Cl- 2,8,7
Ca- 2,8,8,2
O- 2,6
What are the verticals columns in the periodic table called?
Groups
