Unit 1 Vocabulary

An online crossword puzzle with 18 words. Play it free at AgileCrosswords.com.

Clues

Matter with a fixed composition (2 words)
This number is the same for all atoms of the same element
The number of protons and neutrons (2 words)
semiconductors; located along the staircase on the periodic table
Weighted average of the masses of all the naturally occurring isotopes of an element
The law of ____ proportions states that a compound will always contain the same ratio of elements
Combination of two substances in which the initial identities of the substances are not lost
An element's identity is determined by the number of these particles
Horizontal row on the periodic table
Most of the volume of an atom (2 words)
brittle elements that are poor conductors
Combination of two elements in which the elements gain new properties
form of matter that cannot be broken down into simpler, stable isotopes
Atom of the same element with a different number of neutrons
Anything that has mass and takes up space
The majority of the elements; good conductors of heat and electricity
Vertical column on the periodic table; also called family
the smallest unit of matter that retains an element's identity