Mixture
: a combination of two or more components that retain their identities.
When one or more substances are changed into a new substance?
Chemical reaction
, a process in which one or more substances, the reactants, are converted to one or more different substances, the products.
What are densely packed arrangements of particles that take the shape of their containers?
| Question Answer | densely packed arrangements of particles that take the shape of their containers are liquid | Change of state releases thermal energy ? condensation | Soil is an example of mixture | minerals always exist in a ___ form solid |
|---|
Are solutions characterized by the formation of hydroxide ions Oh?
An atom that gains or loses an electron is a charged particle called a(n) ion. …
Bases
are solutions characterized by the formation of hydroxide ions (OH
–
).
What type of chemical bond involves the sharing of a pair of electrons by two atoms in a molecule?
A covalent bond
consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.
What are the three states of matter give examples?
- Solids – relatively rigid, definite volume and shape. In a solid, the atoms and molecules are attached to each other. …
- Liquids – definite volume but able to change shape by flowing. In a liquid, the atoms and molecules are loosely bonded. …
- Gases – no definite volume or shape.
What are the 13 states of matter?
- Bose–Einstein condensate.
- Fermionic condensate.
- Degenerate matter.
- Quantum Hall.
- Rydberg matter.
- Rydberg polaron.
- Strange matter.
- Superfluid.
Are the two main factors that determine the fate of a chemical reaction?
-Rearrangements of atoms within molecules occur.
Direction
and are the two main factors that determine the fate of a chemical reaction.
What kind of chemical reaction is where one substance is broken down into two substances?
| A B | combustion reaction occurs when a substance reacts with oxygen to produce energy in th eform of heat and light | synthesis reaction two of more substances combine to form another substance. | decomposition reaction occurs when one substance breaks down, or decomposes, into two or more substances. |
|---|
What is the chemical change in matter?
Chemical Change. Chemical changes occur
when bonds are broken and/or formed between molecules or atoms
. This means that one substance with a certain set of properties (such as melting point, color, taste, etc) is turned into a different substance with different properties.
What is the solution characterized by the formation of hydroxide ions?
When dissolved in an aqueous solution, certain ions were released into the solution. As defined by Arrhenius, acid-base reactions are characterized by acids, which dissociate in aqueous solution to form hydrogen ions (H
+
) and bases, which form hydroxide (OH
−
) ions.
What is the difference between hydronium ion and hydroxide ion?
Hydroxide = OH−
; hydronium ion is represented as H+ or H3O+ .
What type of ions do bases release?
A base provides either
hydroxide ions (OH
–
)
or other negatively charged ions that combine with hydrogen ions, reducing their concentration in the solution and thereby raising the pH. In cases where the base releases hydroxide ions, these ions bind to free hydrogen ions, generating new water molecules.
What is the force that holds atoms together called?
Chemical bonds
are forces that hold atoms together to make compounds or molecules. Chemical bonds include covalent, polar covalent, and ionic bonds. Atoms with relatively similar electronegativities share electrons between them and are connected by covalent bonds.
Covalent bonding
occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.
triple bond
. a covalent bond in which two atoms share three pairs of electrons. resonance structure.
