Upgrade to remove ads
Only $35.99/year

Periodic Table Venn Diagram- Mendeleev and Moseley Metals and Nonmetals and Metalloids [ATOMS]

Terms in this set (24)

Dmitri Mendeleev
Russian scientist-Created the very fist periodic table
Arranged elements into columns based on atomic mass
Henry Moseley
English scientist created the periodic table that we use today
Discovered that each element had a different amount of protons
Arranged the periodic table based on increasing atomic number
Their Periodic Tables both show...
Periodicity (trends/patterns)
Metals
PHYSICAL PROPERTIES
Shiny
Conduct- Heat and electricity
Malleable (Has the ability to be hammered into a flat sheet)
Ductile (Has the ability to be made into a wire)
Nonmetals
PHYSICAL PROPERTIES
Dull
Insulate
Brittle
Metalloids/Semiconductors/ Semi-metals
PHYSICAL PROPERTIES
Shiny
Semi conducts
Brittle
Atom
Most of an atom is just empty space.
Consists of 3 parts, protons, neutrons, and electrons.
Has a neutral charge
Nucleus
Made up of proton(s) and neutron(s).
Has a positive charge
Protons
Make up together with the neutron(s) an atom.
A proton weighs 1 amu/Atomic mass unit
Has a positive charge
Neutrons
Make up together with the proton(s) an atom.
A neutron weighs 1 amu/Atomic mass unit
Has a neutral charge
Electrons
Orbit the atom core
Travels at a speed of 2,200 km/s
0 amu/Atomic mass unit
Has a negative charge
Quarks
The smaller particles that make up protons and neutrons.
What is the Atomic Mass Unit?
It is the SI unit used to express the masses of particles in atoms.
What is the Atomic NUMBER?
The atomic number equals the number of protons in one atom and electrons a neutral atom.
What is the Mass Number?
The mass number is the sum of the protons and neutrons in one atom.
What is an Isotope?
Isotopes are atoms that have the same number of protons but have different number of neutrons.
What is the Atomic MASS?
The atomic mass is the weighted average masses of all the naturally occurring isotopes of an element.
440 BC
Democritus
Everything in the world is made up of small tiny particles made up of empty space, something he called "atomus".
1803
John Dalton
Common substances all broke down into the same proportions. Concluded that each different substance was just made up of different elements, each a different size and mass that can be "neither created nor destroyed".
1897
J.J Thompson
Showed that atoms are uniformly packed spheres of positive matter filled with negative particles, that he called the "plum pudding" model.
1911
Earnest Rutherford
Conducted an experiment that concluded that an atom is mostly empty space except the nucleus which was the densest part of the atom.
Was called the "father of the nuclear age".
1913
Niels Bohr
Proposed that electrons orbit the nucleus at fixed energies and distances, able to jump from one level to another, but not the space in between.
Created the Bohr model
1926
Werner Heisenberg
Concluded that is was impossible to know the exact speed and position of an electron as they move around.
Created the electron cloud.
How do you find the number of protons, neutrons and electrons?
1) The atomic # equals the # of protons.
2) The electrons in a neutral atom equal the # of protons.
3) # of neutrons = mass # - atomic #
Sets with similar terms