Atoms
More Atoms
Scientists and Stuff
Elements and more
Tuff Questions
100
the study of matter, what it is made of, what its usual characteristics are, and how it reacts with other matter.
What is Chemistry?
100
Positive charges
What is a Proton?
100
What scientist think about atoms.
What is atomic theory?
100
The classification system of the elements.
What is the periodic table of elements?
100
Elements that all have the same number of electrons in their outer shells.
What is the common factor of elements in a group?
200
The smallest piece of an element.
What is an atom?
200
Negative charges.
What is an electron?
200
How scientists identify atoms.
What is by the atomic number?
200
The abbreviation for the names of chemicals.
What is a chemical symbol?
200
The chemical symbol has a second letter.
What happens when 2 or more elements start with the same letter?
300
Substances that contain only one kind of atom.
What is an element?
300
Neutral charges.
What is a neutron?
300
Developed a simplified model of an atom.
Who is Niels Bohr?
300
The horizontal rows of the periodic table.
What is a period?
300
The atomic mass is calculated by adding the number of protons and neutrons. The atomic number is the number of protons.
What is the difference between atomic number and atomic mass?
400
The protons and the neutrons.
What is the nucleus?
400
The number of protons.
What is atomic number?
400
The special machine scientists use to smash atoms.
What is a particle accelerator?
400
The vertical columns of the periodic table.
What is a group?
400
The name of the element, the chemical symbol, atomic number and sometimes the atomic mass.
What kind of information is found inside the square for an element on the periodic table?
500
The numbers of protons and number of neutrons.
What is the atomic mass.
500
The limited cloud-like space where the electrons move.
What is the shell?
500
He came up with a way to organize all of the elements known at his time.
Who is Dmitri Mendeleev?
500
Elements placed by similar chemical properties and react similarly with other elements.
What is categories?
500
Rn
What is Radon?
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