Matter Flashcards
Who developed the periodic table
Dmitri Mendeleev
On the periodic table what are the rows and the columns called?
Rows - Periods
Columns - groups
How is the periodic table organised?
By atomic number (originally mass) and chemical property
What group is Alkali metals on the periodic table?
Group 1
What is group 7 on the periodic table?
Halogens
What group on the periodic table is noble gasses?
Group 8 or 0
Where on the periodic table can you find metals?
The left and the middle side
What can be found on the right side of the periodic table?
Non metals
What are 5 commen non metal elements - what are their states at room temp and symbols?
- Carbon - solid - C
- Hydrogen - gas - H
- Nitrogen - gas - N
- Sulphur - solid - S
- Bromine - liquid - Br
Name 8 common metal elements- what are their states at room temp and their symbols?
- Sodium - solid - Na
- Calcium - solid - Ca
- Iron - solid - Fe
- Aluminium - solid - Al
- Copper - solid - Cu
- Silver - solid - Ag
- Gold - Solid - Au
- Mercury - liquid - Hg
Are metals usually good or bad conductors of heat and electricity?
Metals are usually good heat and electricity conductors
What are 3 properties of metals?
- sonorous
- lustrous
- malleable
What are the 3 alkali metals?
- Lithium
- Sodium
- Potassium
As you go down the Alkali group wha5 happens to the reactivity?
It increases
When reacting to water, what does alkali metals form?
They form an alkali (high ph)
What are some properties of alkali metals (2)
- not very dense
- soft (for a metal)
Does the melting point increase or decrease as you go down the alkali group?
It decreases
Name 4 halogens
- Fluorine
- Chlorine
- Bromine
- Iodine
What are 4 properties of halogens?
- reactivity decreases down the group
- toxic
- forms an acid when reacts with water
- melting point increases down the group
Name 4 Nobel Gases
- helium
- argon
- Neon
- krypton
What’s another word for unreactive?
Inert
What are 3 properties of Nobel gases?
- unreactive
- boiling point increases down the group
- density increases down the group
What are reactants?
- Form a product
- some are irreversible
- some are reversible
What are products?
- elements bond in fixed ratios forming compounds
- compounds are also molecules
Define molecules
More than one atom bonded together
Define polymer
Molecule made of repeating pattern of small molecules
Define ceramic and name 2 properties
Non metal solid
- good insulator of heat and electricity
- brittle
What is a composite?
Material comprised of two substances to gain beneficial properties of both
