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Periodic Table
Question | Answer |
---|---|
subatomic particle with positive charge | proton |
subatomic particle with negative charge | electron |
subatomic particle with no charge | neutron |
location of protons and neutrons | nucleus |
location of electrons | electron cloud |
the number of protons (always the smallest) | atomic number |
the sum of protons and neutrons (always the largest) | atomic mass number |
horizontal rows on the periodic table | periods |
vertical columns on the periodic table | group (family) |
number of periods on the periodic table | 7 |
number of groups/families on the periodic table | 18 |
number of elements on the periodic table | 118 |
change in the number of protons | different element |
change in the number of neutrons | isotope |
change in the number of electrons | ion |
name of Group 1 elements | Alkali Metals |
name of Group 2 elements | Alkali Earth Metals |
name of group 17 elements | Halogens |
name of group 18 elements | Noble Gases |
are mostly solids, shiny, malleable and good conductors of heat and electricity | metals |
are mostly gases, dull, brittle and poor conductors of heat and electricity | non-metals |
have properties of metal and non-metals | metalloids |
metals found in the d block | transition |
metals found in the f block | inner transition |
Created the first periodic table | Mendeleev |
His research led to change in arrangement on the periodic table | Moseley |
Arrangement of elements on 1st periodic table | increasing atomic mass |
Arrangement of elements on current periodic table | increasing atomic number |