Science chapters 2B-3B

Flashcards by ceivers4, updated more than 1 year ago
Created by ceivers4 about 7 years ago


For the Midterm

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Question Answer
John Dalton "atoms cannot be broken down and all atoms of an element are identical"
William Crookes "Identified a stream of negatively charged particles"
J.J Thomson "the atom can be broken into smaller particles and electrons are mixed with the positive particles."
Ernest Rutherford "mostly empty space and small, positive nucleus."
Proton "positive, mass- 1 amu, located in the nucleus"
Neutron "neutral, mass- 1 amu, Location- nucleus"
Electron "Negative, mass- 0 amu, location- electron cloud"
Fact on Isotope Isotopes of an element have the same number of electrons and protons, but different neutrons.
An a- particles has? protons-2, neutrons-2, and electrons-0
A B- particle has? Proton-1, neutron-1, electron-1
Dmitri Mendeleev "a Russian chemist who built the periodic table of elements."
Henry Moseley " an English physicist who arranged the elements according to the atomic number.
How many periods are there on the periodic table of elements? 7
How many groups are there on the periodic table? 18
Metal properties (hint 6) Good conductors, malleable, luster, solids (mercury liquid),ductile, left
Non-metal properties (hint 5) Bad conductors, brittle, dull, gases (bromine liquid), right
Iron Triad Fe, Co, Ni. Metals
Coinage metals Cu, Ag, Au. Pure in nature.
Lanthanides soft
Actinides radioactive
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