1.
Substance
A type of matter with a fixed
composition.
2.
Solution
Homogeneous mixture with particles so small that they cannot
be seen with a microscope.
3.
Colloid
Type of mixture with particles that are larger than those in
solutions, but not heavy enough to settle out.
4.
Tyndall Effect
Scattering of light by colloidal
particles.
5.
Suspension
Heterogeneous mixture containing a
liquid where visible particles settle.
6.
Physical Property
Characteristic of a material you can
observe without changing the identity.
7.
Physical Change
A change in size, shape, or state.
8.
Distillation
A process for separating substances
by evaporating a liquid and recondensing its
vapor.
9.
Chemical Property
Characteristic of a substance that
indicates whether it can undergo a chemical
change.
10. Chemical
Change
A change of one substance to
another.
11. Kinetic
Theory
Explanation of how particles in
matter behave.
12. Melting
Point
The point in temperature when the
solid starts to liquefy.
13. Heat of
Fusion
The energy required to change a
substance from a solid to a liquid at its melting
point.
14. Boiling
Point
The point in temperature when the
liquid starts to boil.
15. Heat of
Vaporization
Amount of energy required for a
liquid to become a gas.
16. Viscosity
The resistance to flow by a fluid.
17. Pascal
Used to measure pressure.
18. Quarks
Smaller particles in neutrons and
protons.
19. Electron
Cloud
Area around a nucleus where
electrons are mostly found.
20. Isotopes
Atoms of the same element that have
different numbers of neutrons.
21. Periodic
Table
A table filled with elements in
order of atomic numbers, etc.
22. Groups
The vertical columns in the periodic
table.
23. Periods
Horizontal rows of elements.
24. Metals
Good conductors of heat and
electricity.
25. Metallic
Bonding
Positively charged metallic ions
surrounded by a electron cloud.
26. Nonmetals
Usually gasses or brittle solids at
room temperature.
27. Diatomic
Molecule
Consists of 2 atoms of the same
element in a covalent compound.
28. Sublimation
The process of a solid going
directly into a vapor.
29. Metalloids
Has properties of both nonmetals and
metals.
30. Allotropes
Different forms of the same element
31. Semiconductors
Elements that conduct under
circumstances.
32. Chemical
Bond
Force that holds atoms together in a
compound.
33. Ionic Bond
Force of attraction between opposite
charges.
34. Covalent
Bond
Attraction formed when elements
share electrons.
35. Oxidation
Number
Tells you how many electrons an atom
has gained or lost.
36. Polyatomic
Ion
Positively or negatively charged,
covalently bonded group.
37. Chemical
Reaction
More than one substances turning
into other substances.
38. Coeffecients
Numbers in front of each substance
in a equation.
39. Combustion
Reaction
Substance reacts with oxygen to make
heat and light.
40. Synthesis
Reaction
2 or more substances that combine to
make another.
Hiii mute,,, thanks for your science :), but i want to ask you,What do you think metaloid is? And give examples of metals and non metals
BalasHapusHello novi, i think metalloids is properties intermediate between the metals and nonmetals.
HapusThe examples of metals are gold, copper, iron etc. and nonmetals are oxygen, hydrogen, nitrogen etc. :)
Can you give me the example of solution?
BalasHapus• An example of a solid solution is brass
Hapus• An example of a liquid solution is aqueous hydrochloric acid (HCl in water)
• An example of a gaseous solution is air
what is polyatomic ion?
BalasHapusA polyatomic ion, also known as a molecular ion, is a charged chemical species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit. The prefix poly- means "many," in Greek, but even ions of two atoms are commonly referred to as polyatomic. In older literature, a polyatomic ion is also referred to as a radical, and less commonly, as a radical group. In contemporary usage, the term radical refers to free radicals that are (not necessarily charged) species with an unpaired electron
HapusCould you explain to me about melting point?
BalasHapusmelting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change. When all the solid has melted, additional heat will raise the temperature of the liquid. The melting temperature of crystalline solids is a characteristic figure and is used to identify pure compounds and elements. Most mixtures and amorphous solids melt over a range of temperatures
HapusGive a sample of metalloids
BalasHapusExamples are silicon, germanium, arsenic, antimony, tellurium, and polonium.
Hapus