Quiz 2 Flashcards
Properties of non-metals?
Can be any state of matter at room temp. Dull Poor conductors Brittle Reactivity varies
What are the properties of metal?
Solid at room temp. Exception - mercury Shiny Good conductors Malleable - bent, rolled, mouldable Ductile - stretchable
What are the properties of metalloids?
Solid at room temp.
Some are shiny
Some are good conductors
Brittle
What are periods?
Horizontal groups on the periodic table.
What are groups/families? What do they tell us about elements?
Vertical groups on the periodic table
Tell us the valence level in a elements atom
What are alkali metals and where are they found on the periodic table?
Very reactive metals with low density and low melting points.
Silver coloured.
In group 1
What are alkaline earth metals and where are they found on the periodic table?
Less reactive then alkali metals. Silver white colour Low density React with air Group 2
What are halogens and where are they found on the periodic table?
Non-metals that are very reactive.
React with alkali metals to form salts
Group 17
What are noble gases and where are they found on the periodic table?
Non-metals that are stable/unreactive
What can the period on the periodic table tell us?
How many energy levels are found on a atom
Stable octet?
Atoms that have a stable octet contain the max. Number of electrons in their valence energy level.
What is a molecular compound?
2 or more non-metal atoms held together by covalent bond.
Atoms share electrons in order to become stable
Electrically neutral
Ammonia formula?
NH3
Glucose formula?
C6 H12 O6
What are ionic compounds?
Transfers of electrons that occur when atoms collide.
This transfer produces an atom with a charge.
Atoms that have gained electrons are called
Ions
Negatively charged ions?
Anions
Positively charged ions?
Cations
Sucrose formula?
C12H22O11
Methane formula?
CH4
Propane formula?
C3H8
Ozone formula?
O3
Hydrogen peroxide formula?
H2O2
Acetic acid formula?
CH3COOH
