Atoms
Atoms and Periodic table
periodic table
History of the atom
Random
100
The positive subatomic particle in the nucleus
What is the proton?
100
Group 2 elements have this many valence electrons
What are 2 valence electrons
100
These are vertical columns on a periodic table
What are groups or families
100
This ancient philosopher came up with the idea of "atomos"
Who was Democritus?
100
What is an isotope?
Elements of atoms with the same number of protons but different neutrons
200
The negative subatomic particle located outside the nucleus.
What is the electron?
200
This number tells you the number of protons or electrons
What is the atomic number
200
These are horizontal rows on a periodic table
periods
200
Discovered the electron and proposed the plumb pudding model.
Who was JJ Thomson?
200
Which element has the lightest mass
What is Hydrogen
300
The neutral subatomic particle located within the neucleus
What is the neutron?
300
An element is in period 3, group 18 and in the noble gas family. Would it be classified as a metal, nonmetal or metalloid?
nonmetal
300
The atomic number tells us how many __________ an element has in its nucleus.
protons
300
Discovered the proton and used the gold foil experiment to discover it.
Who was Rutherford
300
How many valence electrons does Aluminum have?
3
400
The Bohr model of the atom has the electron in these.
What are electron shells
400
Argon (Ar) has this many valence electrons.
What is 8
400
An isotope of Oxygen has a mass of 16. Which means it has this many protons.
What is 8?
400
Discovered the neutron.
Who was Chadwick
400
Write the formula for determining the number of neutrons in an atom when you know the number of protons and atomic mass.
Neutrons = Atomic mass - Protons
500
This is the name for the elctrons in the outermost shells
What are valence electrons?
500
Chlorine (Cl) is located in group 17 which is commonly called the...
What are the hallogens?
500
An isotope of Oxygen has a mass of 16. Which means it has this many neutrons?
What is 8? 16-8=8
500
Formed the atomic theory model of the atom (Billiard Ball model); English schoolteacher
Who was Dalton
500
What element has 3 valence electrons on the 4th electron shell?
Gallium