Atomic Structure

An online crossword puzzle with 20 words. Play it free at AgileCrosswords.com.

Clues

States that matter is made up of tiny particles called atoms (2 wds)
Scientist who discovered the nucleus
The gold foil experiment showed that an atom is mostly made up of this (2 wds)
First person to say that matter is composed of atoms
The least massive subatomic particle
Isotopes are atoms of the same element which a different number of these subatomic particles
Thomson's plum pudding model was based on the fact that atoms have this overall charge
Developed 5 principles to explain the behavior of compounds observed during quantitative experiments
The SI unit of the amount of a substance. Equal to the amount of particles in 12 g of carbon-12
The unit for atomic mass or formula mass
Thomson discovered the electron with this type of tube (2 wds)
Believed that matter is composed of the four elements earth, wind, water, and fire
The mass of one mole of a substance
Scientist who made the first contributions to the discovery of the mole
The law of _______ proportions states that a compound will always contain the same ratio of elements
When an atom gains electrons, its charge becomes this
An elements identity is determined by the number of these particles
The number of particles in this part of the atom determines the mass number
Greek for indivisible
Atoms of the same element that have a different charge