Chemistry Atom structure & the Periodic table Sept 2017 Flashcards
What is the Atomic Number?
The bottom/smaller number
What number is the Mass number?
Top number/bigger number
What does the Atomic number tell you?
The number of Protons
What does the mass number tell you?
The number of Protons and Neutrons
What is an Isotope?
An Isotope is an atom with the same number of Protons but a different number of Neutrons
What is relative Atomic mass?
Relative Atomic Mass is the average mass of atoms of an element taking into account the mass and amount of each Isotope it contains
What are the rules for atoms?
Maximum of 2 electrons in the first shell
8 in shells 2 and 3
18 in all shells after 3
What is a group?
A group is a column in the periodic table stating how many electrons are in all of the elements outer shells
What is a period?
A period is a row in the periodic table stating how many shells are in each atom.
What is an Ion?
An Ion is a charged particle as the atom doesn’t have the same amount of Protons as Electrons.
What charge does an Ion have if it has more Protons?
It has a positive charge
What charge does an Ion have if it has more Electrons?
It has a negative charge
State two properties of metals
Any two from: High melting point Conductor of electricity Conductor of heat Shiny High density Strong Basic oxides Malleable
State two properties of non-metals
Any two from: Low melting point Insulator of electricity Insulator of heat Dull Low density Weak Acidic oxides Low malleability
What happens when metal react with metals?
Nothing because metals can’t react with each other
