Dalton's Creek
He developed the first atomic theory.
Who is John Dalton?
The number of protons in an atom.
What is the atomic number?
This is the currently accepted model of likely locations for electrons in atoms.
What is The electron cloud model?
Columns in the periodic table.
What are groups?
This says: Matter cannot be created or destroyed, but it can change forms.
What is the law of conservation of mass?
The sum of the protons and the neutrons in the nucleus of an atom.
What is the mass number?
What is the quantum- mechanical model?
Rows in the periodic table.
What are periods?
This says: Samples of a pure compound always have the same elements in the same mass proportion.
What is the law of constant composition?
Atoms of an element with the same number of protons but different numbers of neutrons.
What are isotopes?
A region of space around the nucleus where electrons are likely to be found.
What are valence electrons?
Dalton's model was changed to reflect his new evidence.
Who is J.J. Thompson?
The element sodium is made up of atoms with 11 protons. A Sodium-23 atom has this number of electrons and this number of neutrons. DAILY DOUBLE
What is 11 electrons and 12 neutrons?
Atoms emit this when the electrons go from a higher energy state to a lower energy state.
What is light energy?
The elements in group 7A. When they react with a metal, they form a salt. DAILY DOUBLE
What are halogens?
What are the noble gases?