You Define Me!
The smallest chemical unit of matter
What is an atom?
The number of protons in an atom
What is the Atomic Number?
This group consists of shiny, malleable metals and are the most reactive group
What is Alkali Metals?
The atomic mass of Francium
What is 223?
He developed the periodic table in the 1870s
Who is Mendeleev?
Two or more atoms linked together to make a substance with unique properties
What are molecules?
The sum of the protons and neutrons in an atom
What is the mass number?
This group is not classified as a metal but as a metalloid
What is the Boron Group?
The number of protons in Antimony
What is 51?
This Danish scientist hypothesized that electrons orbit around the nucleus at fixed distances
Who was Niels Bohr?
Atoms of an element with the same number of protons but different number of neutrons
What are Isotopes?
The particle in an atom with a negative charge
What is an electron?
This group contains an element that is required for life. All the reactions that occur in your body are controlled by compounds containing this group
What is the Carbon Group?
This element is required for life
What is Carbon?
This scientist received the Nobel Prize in Chemistry for his work with radioactive substances
Who was Ernest Rutherford
A region of space around the nucleus where electrons are most likely to be found
What are orbitals?
The amount of this particle tells you what kind of atom it is
What is a proton?
This group has elements that are used in fertilizers and explosives
What is the Nitrogen Group?
This man-made radioactive element has a mass of 288
What is Moscovium
An English scientist, who conducted an experiment with glowing electrons and electric current in order to learn more about atoms
Who was JJ Thomson?
Electrons that are in the highest energy level (farthest from the nucleus) of an atom
What are valence electrons?
The distance from the center of an atom to its outer edge
What is less than a nanometer or one millionth of a centimeter?
This group has an element most common in the earth's crust and reacts with just about anything to form new compounds
What is the Oxygen Group?
This element is the most reactive of the Halogen group
What is Flourine?
The scientist who developed a theory to explain why elements in a compound always join in the same proportion.
Who was John Dalton?