Periodic table
Groups go this way on the periodic table
Vertical (Up and down)
What kind of metals in Group 1 of the periodic table called?
Alkali metals
This person was Bohr's predecessor.
Ernest Rutherford
What did Rutherford discover?
The nucleus is positively charged
This person discovered that atoms have negative particles (electrons) using a cathode ray tube.
Plum pudding model showed that electrons are dispersed in a uniform positive charge
Model looks like a chocolate chip cookie
J.J Thomson
The steps on the periodic table separate metals on the left from __ on the right
Non metals
Group 2 in the periodic table is considered the?
Alkaline Earth
Planetary model
Conducted what famous experiment
Gold foil
Greek philosopher, Democritus, believed
All matter around us is made of indivisible tiny particles "atomos"
Periods go this way on the periodic table
Horizontal (side to side)
What kind of elements/metals are groups 3-12 considered?
Transition elements/metals
Bohr's model of the atom states that ELECTRONS ORBIT THE NUCLEUS IN..
Fixed paths
Rutherford's planetary model shows:
Electrons orbiting the nucleus like planets around the sun
John Dalton theory is _ of _ in chemical reactions are the result of an atom
Conservation of mass (No atoms are lost or made in a chemical reaction, they atoms join together in different ways to form products)
To find the number of neutrons subtract the __ __ from the __ __
Atomic number (Number at the very top of the symbol)
Atomic mass (Last number/weight)
These groups are named after the first member of the group
Groups 13-16
The order of filling electrons in their orbits are
2,8,8,18
This student of Rutherford discovered the neutron and that is had no charge
James Chadwick
Who discovered that:
elements are made up of tiny particles called atoms
atoms of one element are identical while atoms of different elements are different
different atoms form compounds in constant ratios
John Dalton
At the very bottom of the periodic table, why were the groups kicked out and what are they considered/called.
They were kicked out because it would've taken up too much space. They are called the Outer Transition elements or the RARE EARTH metals.
*They are the Lanthanides and Actinides both named after the first member of the group.*
Group 17 is considered?
Group 18 is considered?
Halogens
Noble gases
In Bohr's model, the electrons closest to the nucleus have the __ energy
Lowest
Known as the what?
Father of nuclear physics
Who discovered the electron's charge to mass ratio: 1.76 x 10^8 C/g
J.J. Thomson