Important People
Important Discoveries
Groups
Areas of the Periodic Table
atom parts & definitions
100
He came up with the first version of the periodic table.
Who is Mendeleev
100
Mendeleev arranged the first periodic table by this number
What is atomic mass
100
Elements in this group are unreactive gases
What are the noble gases
100
A row on the periodic table.
What is a period
100
When elements are arranged in order of increasing atomic number there is a periodic pattern to their properties.
What is periodic law
200
This person's "atomic theory" had 5 parts: 1-atoms make up everything 2-different elements have different atoms 3-each element's atoms are the same 4-atoms combine with other atoms to make compounds 5-atoms cannot be divided
Who is John Dalton
200
After years have passed, Dalton's atomic theory is considered to be [choose one] a-abandoned b- an elaborate fraud c-expanded & modified d-still 100% same
What is c-expanded & modified, still mostly true
200
Elements in this group have 4 valence electrons.
What are group 14 elements (C, Si, Ge, Sn, Pb)
200
A column on the periodic table.
What is a group
200
What do we need to know about each atom to draw a Lewis structure?
What is the type of atom (element name), & the number of valence electrons it has
300
He revised the periodic table so that elements were arranged in order of increasing atomic number.
Who is Henry Mosely
300
JJ Thomson's cathode rays were deflected or bent when a magnet was put near the cathode ray tube. What did this tell us?
Electrons have a charge & were attracted to the magnet
300
Elements in this group are very reactive metals and have ONE electron in an s orbital.
What are the alkali metals
300
Separates elements with properties of metals and nonmetals.
What is the staircase
300
What is an isotope
an atom of an element that has the same number of protons but a different number of neutrons Ex: Carbon-12 and Carbon-13
400
This scientist discovered the electron by examining the charge of particles in a cathode ray tube
Who is JJ Thomson
400
Compared to the protons & neutrons in the nucleus, how much mass do electrons have?
What is extremely small mass
400
This group is commonly called the alkaline earth metals.
What are the group 2 elements
400
Elements in this part of the periodic table have electron configurations that end in d orbitals.
What are the transition metals, or d block
400
Elements with an electron configuration of 1s2 2s2 2p6 3s2
What is magnesium (Mg)
500
He fired alpha particles at gold foil to discover the nucleus of an atom
Who is Rutherford
500
Rutherford shot alpha particles at gold foil. Most of them went straight through the foil. A few bounced back. What did the these results tell Rutherford about the structure of the atom?
Atoms were mostly empty space, since most particles traveled through the foil. Somewhere in the atom is a dense, heavy nucleus with a positive charge, which repels the positively charged alpha particles.
500
These two groups make up the f block
What are the lanthanides (57-71) and actinides (89-103)
500
Carbon has an atomic mass of 12.01 and an atomic number of 6. What is carbon-13?
what is an isotope of carbon with an atomic mass of 13 (6 protons, 6 electrons, 7 neutrons)
500
The number 15 on phosphorus tells you there are 15 of these in each atom of phosphorus
What are 15 protons and 15 electrons
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