Element
This scientist noticed similar chemical and physical properties when his graph was rolled into a cylinder
Chancourtois
What are elements that occur naturally as single atoms?
what are monatomic elements
He used x-rays to find the atomic number of atoms in elements and arrange the elements in increasing order
Who is Henry Moseley
The precursor of chemistry, a mixture of mysticism, magic, and genuine science.
What is alchemy
Mendeleev arranged the elements of his periodic table in order of increasing __________
What is atomic mass
This states that the properties of the elements vary with their atomic numbers in a periodic way
What is the periodic law of the elements
What type of elements are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine?
What are diatomic elements
Neutrons and protons make up the nucleus and equal _.
What is the atomic mass?
a substance that could not be broken down into simpler substances
What is an element
What did the blank spaces in Mendeleev’s periodic table represent?
What are undiscovered elements
The theory of repetition of certain properties at regular intervals when elements were placed in order of atomic mass
periodicity
What type of elements are helium, neon, argon, krypton, xenon, and radon?
What are monatomic elements
Determines the atomic number
What are protons?
one or two letters from the element’s name used to identify the element
Henry Mosely’s work led to Mendeleev’s periodic table being rearranged according to ________________ ________________
Atomic Number
This scientist tried to group the elements into triads due to similar chemical properties
Who is Johann Dobereiner
this individual criticized others for not sharing scientific results and he was interested in identifying pure substances, especially elements
Who is Robert Boyle
He noticed patterns in repeating eighths called octaves when organizing the elements
Who is John Newlands
this type of element consists of a molecule made of two identical atoms.
diatomic
What major changes have been made to the periodic table of elements since Mendeleev
what are the additions of elements
This chemist developed a much simpler and logical system of naming elements based on the first two letters of its Latin name
Who is Berzelius
this individual broke down water into oxygen and hydrogen to show that classical elements like water were not really elements at all
Who is Antoine Lavoisier
Which is not a non-metal from the following: Boron, Iron, Hydrogen, Argon?
Iron
All the early attempts to organize the elements revealed that element properties seemed to repeat at regular intervals is a term called?
What is periodicity
The solution to the problem of chemical symbols being difficult to use
What is naming them with two letter from the element's Latin name