Basics
A chart of the chemical elements that are displayed in rows horizontally in order of increasing atomic number and vertically according to similar chemical properties of their atoms.
What is the periodic table?
The temperature at which a liquid turns into a solid when cooled.
What is the freezing point?
The smallest component of an element having the chemical properties of the element
What is an atom?
A chemical change that occurs when two or more substances combine to form a new substance.
What is a chemical reaction?
the starting materials in a chemical reaction
What is a reactant?
The chemical formula for water
What is H20?
The temperature at which a given solid will melt.
What is the melting point?
A group of atoms bonded together
What is a molecule?
a change from one state (solid or liquid or gas) to another without a change in chemical composition, can also include changes in shape or size.
What is a Physical Change?
is a substance that is formed as the result of a chemical reaction.
What is the Product?
The six most common elements that living things are made of
carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.
The transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.
What is sublimation?
chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons.
What is a chemical bond?
the conversion of a vapor or gas to a liquid.
What is condensation?
glucose and oxygen
What is the product of carbon dioxide and water and sunlight?
hold their shape because their molecules are tightly packed
Whatis a solid?
the temperature at which a liquid boils and turns to vapor.
What is the boling point?
A chemical bond formed between two ions with opposite charges
What is an ionic bond?
the motion of the molecules changes
What happens to the molecules of a substance during a phase changes?
matter cannot be created or destroyed.
What is conservation of matter?
is a state of matter in which can flow and change its shape but not its volume
What is a liquid
the process of turning from liquid into vapor.
What is evaporation?
hydrogen, ionic and covalent bonds
What are the 3 types of chemical bonds?
is a change in the state of matter
What is phase change?
an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the products
What is a balanced equation?