Show:
Metals
Atoms
Periodic table
Atomic
theory
Nonmetals, and semimetals
100
Elements that are good conductors of electric current and heat
What are metals
100
Smallest particle of an element
What is an atom
100
Considered the creator of the first periodic table
Who is Mendeleev
100
He thought that atoms were like smooth balls that could not be broken into smaller pieces
Who is Dalton
100
Element that lacks most of the a metal
What is a nonmetal
200
Material that can be hammered or rolled into flat sheets or other shapes
What are malleable metals
200
A negative particle
What is an electron
200
Elements organized in horizontal rows
What is a period
200
He suggested that atoms had negatively charged electrons in a positive sphere
Who is thomson
200
Molecule that consists of 2 atoms
What is a diatomic molecule
300
Material that can be pulled out or drawn into a long wire
What is a ductile metal
300
Positively charged particles
What is proton
300
Vertical columns of the periodic table
What are groups
300
In 1911 he stated that the atom was a mostly empty space
Who is Ernest Rutherford
300
Salt forming element
What are halogens
400
Ability of an object to transfer heat
What is Thermal conductivity
400
positive charged particles
What is a proton
400
Representation of an element usually consisting of one or 2 letters
What is a chemical symbol
400
He showed that electrons could have only specific amounts of energy
Who is Niels Bohr
400
Elements that do not form compounds
What are inert gases
500
Ability of an object to transfer an electric current
What is electrical conductivity
500
Tiny region in an atoms center
What is a nucleus
500
Average mass of all isotopes in an element
What is the atomic mass
500
Electrons the do not orbit the nucleus like planets
What is the cloud model
500
A metal that has some properties of both Metal and nonmetal
What is a semimetal