The Periodic Table (1) Flashcards
The elements are arranged in order of atomic number - the number of __________ in the nuclei of the atoms
Protons
The vertical columns are called __________
Groups
The horizontal rows are called ____________
Periods
Metals tend to be ________ with ______ melting and boiling points and with relatively _______ densities
Solids
High
High
Elements in the same ________ have the same number of ____________ in their outer shells, this governs how they react meaning elements in the same ________ will have similar chemical properties
Group
Electrons
Group
Metals are _______ conductors of electricity and heat
Good
True or false: Metals are shiny
True
Metals form ___________ ions in the compounds
Positive
Metals have oxides which tend to be basic, reacting with ________ to give a salt and water
Acids
Non metals tend to have ________ melting and boiling points (carbon and silicone are obvious exceptions)
Low
Non metals tend to be _________ and solid and, even if they are crystalline they don’t have the same _________
Brittle
Shine
Non metals don’t usually conduct electricity - __________ and __________ are exceptions
Carbon and silicon
Non metals tend to form ____________ ions and covalent compounds
Negative
Non metals are ________ conductors of heat
Poor
Non metals have oxides which are ___________ or neutral
Acidic
The Periodic Table shows the elements in order of increasing ___________ number
Atomic number
The period number is the same as the number of occupied ___________ levels
Energy levels
The group number is the same as the number of ____________ in the outer shell
Electrons
The properties of an atom depend on the number of ____________ they have
Electrons
The lowest energy levels are always filled __________ - these are the ones closest to the ____________
First
Nucleus
How many electrons are allowed in the first shell
2
How many electrons are allowed in the second shell
8
How many electrons are allowed in the third shell
8
Atoms want to have a _________ outer shell like the noble gases in group ___
Full
0
In most atoms the outer shell is not full and this makes the atom want to _________
React
The elements on the __________ side of the periodic table are all classified as metals
Left
The elements on the __________ side of the periodic table are all classified as non-metals
Right
Metal oxides are basic. What does this mean?
That they will neutralise acids.
Metal oxides which dissolve will form solutions with a pH of _______ than 7
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