History of Atomic Models
This word means "uncuttable" in Greek
Atom
This is the smallest subatomic particle
The electron
These are atoms of the same element that differ in their number of neutrons
isotopes
These elements are group one in the periodic table.
alkali metals
The electrons in the outermost energy level of an atom are called _________________.
Valence electrons
This is the most abundant state of matter in the universe
plasma
JJ Thomson discovered this subatomic particle.
The electron
This the largest subatomic particle
neutron
Nitrogen-14 and nitrogen-15 differ in their number of ______________.
neutrons
In what part of the periodic table is iron found?
transition metals
An anion has more ___________ than ___________.
electrons / protons
This scientist discovered oxygen
Joseph Priestly
This is the name of JJ Thompson's atomic model.
Plum pudding model
These two particles are found in the nucleus
protons and neutrons
How many neutrons are found in nitrogen-15?
8
What family (by name) contains bromine?
the halogens
What are two ways an ion can be made?
gaining or losing electrons
This is the most conductive metal
silver
This person's atomic model has electrons orbiting the nucleus at fixed distances.
Neils Bohr
Elements on the periodic table are arranged by their ________________.
Atomic number
The mass number is the sum of what two particles?
protons and neutrons
Which atom is larger, potassium or sodium?
Potassium
How many valence electrons does nitrogen have?
5
Which element gives a red flame test?
strontium
Ernest Rutherford discovered the nucleus by observing this
Alpha particles bouncing off gold foil
All atoms of a particular element have the same number of ____________.
Protons
Unstable isotopes are this
radioactive
This element is the most electronegative
Fluorine
What type of ion does oxygen form?
O2-
This movie contains the phrase "cotton-headed ninny muggin"
Elf