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Chemistry

Atoms and Periodic Table

QuestionAnswer
The smallest particle into which an element can be divided. Atom
Negatively charged particles of an atom Electrons
The area of an element with NO CHARGE Neutron
The TWO particle parts that are in the nucleus of an atom Neutrons and protons
The center of the atom Nucleus
Electrons are likely to be found in this area Electron clouds - outside the nucleus
The positively charged particle of an atom Protons
The three main parts of an atom Protons, neutrons, electrons
The number of protons in an element identifes this Atomic number
An atom that has the same number of protons but a DIFFERENT number of neutrons as other atoms of the same element. Isotope
The total number of protons and neutrons in an atom Mass number
Ancient Greek who said the atom was the smallest bit of matter - the 'uncuttable' piece Democritus
English scientist in 1700's who said atoms could not be created, divided, or destroyed, and atoms could join together to form new substances John Dalton
This English scientist discovered electrons in 1897 with his cathode-ray tube experiment J.J. Thomson
Scientist, in 1909 who discovered the nucleus of atoms with his 'shooting range' experiment. Ernest Rutherford
Danish scientist, in 1913, said electrons moved around the nucleus in fixed paths. Niels Bohr
The vertical columns of the periodic table of element Groups (or families)
The horizontal rows across the periodic table of elements Periods
Group I Alkali Metals
Group 18 Noble Gases
Groups 3-12 Transition Metals
Group 2 Alkaline-Earth Metals
Group 13 Boron Group
Group 14 Carbon Group
Group 15 Nitrogen Group
Group 16 Oxygen Group
Group 17 Halogens
Created by: nmerson
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