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particle that makes up matter
Atom
What's an Element
a substance made of atoms that are identical.
What's phase change?
The process of a substance going from one phase of matter to another without changing any chemical properties.
What's a liquid?
a substance that flows freely but is of constant volume, having a consistency like that of water or oil.
What's a solid?
firm and stable in shape; not liquid or fluid
What's matter?
anything that has mass and takes up space
True or False: Oxygen is a gas
True: Oxygen forms a chemical compound (O2) of two atoms which is a colorless gas at normal temperatures and pressures.
True or False: all Elements found in nature?
False because some of them are to dangerous to be out in nature.
Can matter be created or destroyed?
No. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
What's a gas?
a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).
Whats the difference between a Chemical and Physical change?
A physical changed can be reversed (ex. like water melting and freezing) While a Chemical change can't be reversed. (ex. wood burning)
What's a Mixture?
a heterogeneous combination of two or more substances that keep their properties.
How many Elements are on the Periodic Table?
118
True or False: Melting Point and Boiling point is the same
False: Boiling point is where the temperature where a substance turns from a liquid to a gas. Melting Point is the temperature where a substance turns from a solid to a liquid.
True or false: gas,liquid,or solid can be turned into one another?
True
True or False: Mass and Volume are the same thing
False: Volume is the amount of space while Mass is the amount of matter
The measurement of the amount of kinetic (or motion) energy within a substance.
Temperature
What is Solvent?
the substance that dissolves the solute.
What's boiling point?
the temperature where a substance turns from a liquid to a gas.
What are elements made up of?
They are made up of atoms.
What's the difference between a Solute and a Solvent?
A Solute is the substance that is being dissolved in a solution. A Solvent the substance that dissolves the solute.
The amount of a substance that is in a specific amount of space. (Density=mass/volume)
Density
What's Solubility?
the ability for a substance to dissolve
What's Melting point?
the temperature where a substance turns from a solid to a liquid.
What's the atomic number for Oxygen?
8