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Chemistry Vocabulary 1

Having a proper vocabulary is critical. In order to do chemistry correctly, we need to speak chemistry correctly. 
Across
Mass per unit volume. This is a measure of how much "stuff" an object has in a given volume (e.g., grams per a cubic centimeter)
A state of matter with a well defined volume in which particles freely flow.
The "starting material" in a chemical reaction.
An American brand and trade name for automotive aftermarket products. In Chemistry, it refers to a standard in temperature and pressure.
A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.
A very versatile element, capable of forming an incredible number of compounds. All organic compounds contain it.
A state of matter characterized by particles arranged such that their shape and volume are relatively stable.
The temperature at which a liquid turns into a gas.
6.02 x 10^23 molecules is ONE of these. Yeah, that's a big number!
The temperature at which a liquid turns into a solid.
The basic unit of a chemical element. It's the fundamental building block of matter.
Reactive non-metallic elements in the VIIA group of the Periodic Table. Some of these you already know, such as fluorine, chlorine, and iodine.
The positively charged center of an atom consisting of protons and neutrons.
Usually defined as a compound that does not contain carbon. However, this term also defines carbon dioxide, carbon monoxide, and carbonates.
An insoluble solid (doesn't dissolve) that usually falls to the bottom of a solution.
In general, a compound that contains carbon is called this. This compound makes up a very small percentage of the Earth's crust, but is the basis of life.
A molecular bond that involves the sharing of electron pairs between atoms. Common examples include water, hydrogen gas, and carbon dioxide.
A row in the Periodic Table.
Down
A homogeneous mixture of two or more substances. A common example would be a substance dissolved in water.
A material made up of two or more different substances which are physically combined, but in which the substances retain their individual identities.
The temperature at which a solid changes to a liquid.
When a solid changes directly to a gas, such as dry ice evaporating, we call this _________
A subatomic particle with a negative charge. You can impress your science teacher by remembering that this particle is a "first generation lepton"!
A substance whose atoms all have the same number of protons (what we call its Atomic Number)
A substance formed from two or more elements.
A beautiful;u organized arrangement of the elements that groups them by similar atomic structure (and hence similar chemical properties).
The "fourth state of matter".
Helium, Neon, Argon, Krypton, Xenon and Radon have nothing to do with royalty, but an element in this list is called this.
Most people use the Fahrenheit for temperatures. Scientists prefer Celsius. But when using 'T' (temperature) in a numerical equation in chemistry, we use this scale!
Something made as the result of a chemical reaction.
A colorless, odorless, tasteless gas that facilitates rust and fire.
Any chemical that releases protons or H+ into water. Your stomach has lots of this in it.
A state of matter characterized by particles arranged such that their shape and volume are relatively stable.
A chemical link between atoms in molecules.