one of a class of substances that cannot be separated into simpler substances by chemical means
What is a elements
100
Dmitri Mendeleev
What is created the Periodic Table
100
Has 8 protons and its atomic number is 8.
What is Oxygen
100
Has a red and brownish.Red on fresh surfaces. Often with black or green tarnish.
What is copper
100
Calcium's symbol.
What is Ca?
200
composed of two or more parts
What is a compound
200
John Dalton
Who led to the ideas for the acceptance of atoms
200
Electrons
What is the smallest sub-atomic particle?
200
nearly white, lustrous, soft, very ductile, malleable, it is an excellent conductor of heat and electricity.
What is silver?
200
he smallest unit of an element that has all the basic properties of the element
What is a Atom.
300
Something of the same kind; or alike
What is Homogenous
300
J.J. Thomson's proved that atoms are composed of even smaller particles using this model.
What is Thomson's Plum Pudding Model?
300
The electron is a negatively charged particle found in the atoms of all the elements.
What is an electron
300
a silver white liquid, and is very poisonous if not handled right.
What is mercury
300
the number of protons in the nucleus of an atom,determines the chemical properties of an element and its place in the periodic table.
What is a Atomic Number?
400
to separate or change into ions.
What is Ionization
400
this person reasoned that all positively charged particles where contained
What is Rutherford
400
a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron
what is a proton
400
A bright yellow color with a conduction of electricity, also it is a metal with a hard texture. Plus it is used for money.
What is Gold?
400
The first list of 23 elements was compiled by
What is Antione Lavoisier?
500
containing negative electricity
What is electronegativity
500
the inside of a atom
What is a nucleus
500
atomic number is 1 and has 1 proton
what is Hydrogen
500
Has a melting point of 3465 °F and is a element.
What is Chromium
500
The statement that there is a periodic repetition of physical and chemical properties of the elements when arranged by increasing atomic number is known as.