Show:
Vocabulary I
Vocabulary II
People
Odds and Ends I
Odds and Ends II
100
nucleus
What is the center of an atom?
100
arrangement of elements by similar properties
What is the Periodic Table of Elements?
100
Democritus
What is the name of the Greek philosopher who named the atom.
100
The attraction between these is what holds an atom together.
What are electrons and protons?
100
The elements on the left side of the Periodic Table (except Hydrogen) are all this.
What are metals?
200
element
What is a substance made up of only one kind of atom (a pure substance)?
200
compound
What is a substance made up of two or more elements?
200
The name of the scientist associated with the atomic theory.
Who is John Dalton?
200
Name three properties of metals.
What are luster, malleability, ductility, conducts heat, conducts electricity?
200
insulator
What is a substance that do not conduct heat or electricity?
300
proton
What is subatomic particle with a positive charge?
300
molecule
What is two or more atoms bonded together?
300
In 1913, this scientist made a model of the atom that resembled our solar system.
Who is Niels Bohr?
300
The information a chemical formula gives.
What is the names of the elements and the numbers of atoms of each element in a compound?
300
alloy
What is a mixture of metals?
400
atom
What is the smallest unit of an element with all the properties of that element?
400
electron
What is a subatomic particle with a negative charge?
400
The organizer of the elements into a periodic table.
Who is Dmitri Mendeleev?
400
An element that has some properties on nonmetals and some properties of metals.
What is a metalloid?
400
Diamonds, graphite and coal are all made of of these kinds of atoms.
What are carbon atoms?
500
neutron
What is a subatomic particle with no charge?
500
This number tells how many protons there are in the nucleus of an atom of a specific element.
What is the atomic number?
500
This is how scientists today arrange elements on the periodic table.
What is by atomic number?
500
When atoms join together to form a compound, they undergo this kind of change.
What is a chemical change?
500
State the atomic theory.
What is "all matter is made up of atoms"!