PERIODIC TABLE 4 SQUARE
QUESTIONS
VOCABULARY
1. What is the atomic number of Carbon?
atom
element
Chemical
Compound
Molecule
Diatomic molecule
Period
Group/family
Nobel Gas
Inert
Isotope
Ion
Synthetic
Metal
NonMetal
Mettaloid
Semiconductor
Lanthanides
Actinides
halogens
2. What is the atomic mass of Nitrogen?
3. How many protons does Beryllium
have?
4. How many neutrons does Sodium
have?
5. Difference between atom, element,
molecule, compound
6. Explain: Protons are the DNA of an
element.
NOTES
Mendeleev – father of the periodic table.
based on atomic mass
ACTIVITY: Put on periodic table:
Atomic number
Atomic symbol
Periodic Table Timeline
Element Name
1860 – 60 elements, no organization
Atomic Mass
1869 – Mendeleev based on atomic mass
Groups
1870 – some elements had similar
Periods
properties
Metals
1886 – all gaps in Mendeleevs pattern
Non metals
filled in as he presicted
Mettaloids
1914 – Henry Mosely established current
Lanthanides
pattern based on atomic number
Actinides
1915 – periodic law – repeating chemical
Halogens
and physical properties change periodically Nobel gases
with atomic number.
State of Matter
Valence
Bohr Model
Lewis Dot Diagram
atom – smallest unit of an element that has all the properties of that element.
element - pure substance that cannot be separated into simpler substances
chemical – any substance with a defined composition
compound – pure substance composed of 2 or more elements chemically combined
molecule - smallest unit of a compound that has all the properties of that compound.
Molecules are made up of atoms that are held together by chemical bonds.
diatomic molecule – molecule made up of 2 atoms of the same element
period – horizontal(left to right) row of elements
group/family – vertical (top to bottom) column of elements
nobel gases – un reactive non metals, group 18 on periodic table
inert – cannot form chemical bonds beause they have full energy shells
ions – charged particles that form when atoms gains or loose electrons
isotope – atoms in a group that has the same number of protons as other atoms of that
element but a different number of neutrons.
synthetic – man made in a lab, not natural
metal - shiny, conduct heat energy and electric current, malleable
non-metals – dull, do not conduct heat or electricity, brittle
mettaloids – properties of both metals and non-metals, called semiconductors
semiconductor – properties of both metal and non-metal
lanthanides – shiny reactive metals
actinides – all radioactive or unstable
halogens – very reactive nonmetals