Who dunnit
Who is responsible for the Gold Foil Experiment?
Earnest Rutherford
Who discovered Neutrons in the nucleus?
James Chadwick
Who said particles were mainly solid and indivisible?
Dalton
How many Protons does Chlorine have?
17
Hydrogen and Francium (group 1) have what in common?
Same number of valence electrons (one.)
What makes one element different from the a different element?
Proton?
Neutron?
Electron?
Proton
Discovered atoms have a nucleus and protons were in the nucleus and mainly empty space.
Earnest Rutherford
What kind of charge does a proton have?
Positive
He was the first to call small particles atoms
Democritus
How many neutrons does Hydrogen have?
none, zero, squat....
It's atomic number is 1, so it has....
It's atomic number is 1, so it has....
What element has 15 electrons, 16 neutrons, and only five valence electrons?
(P) Phosphorus.
What is the mass number of an atom with 13 protons, 13 electrons, and 14 neutrons?
27 AMU.
Neutrons plus protons equals AMU amount.
Who was the first to discover electrons are in orbits?
Niels Bohr
What kind of charge does a neutron have?
Neutral
What column elements has five valence electrons?
Column 15 or 5a
If the atomic number increases by five, what happens to the number of electrons in a neutral atom.
they are equal and therefor have increased by five also.
How many valence electrons does Potassium (K) have?
How many electrons does it have?
One (1)
19 electrons
Draw a Lithium unit with the correct number of protons, neutrons, and electrons using a Bohr Model.
Show me the drawing
Who was responsible for the solar system model?
Neil Bohr
What kind of charge does an electron have?
negative
Where is the mass of a atom located?
In the nucleus
What element has four protons and two valence electrons?
Beryllium
Au (gold) has an atic number of 79, and an atomic mass of 197. How many protons does it have? How many electrons? How many neutrons?
79 protons
79 electronsAtomic mass 197- Atmic number 79 =Neutrons.
197-79 is 118. 118 neutrons.
Draw a Lithium unit with the correct number of protons, neutrons, and electrons using a Lewis Dot Model.
Show me drawing.
Who said Electrons are not fixed in orbits and had electron cloud model?
Erwin Schrodinger
/Where is the mass of a element located?
In the nucleus. (protons and neutrons are located here)
Does the nucleus have much volume?
No, just almost all the mass. It is tiny.
Beryllium has how many protons in the nucleus?
Four (4)
What particles are inside an atoms nucleus?
Protons and neutrons.
Name the parts of the drawing: Model shown in class.
Draw it and label/name each part shown.
done in class.