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Cycle 4 (Elements (An element is a substance consisting of atoms which all…
Cycle 4
Elements
An element is a substance consisting of atoms which all have the same number of protons - i.e. the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical methods. Elements can only be changed into other elements using nuclear methods.
Example of Elements are, Hydrogen, Carbon, Oxygen, Aluminium, Nitrogen, Magnesium, Chlorine, Sillicon, Lithium... etc...
Reactions
chemical reaction definition. A process in which atoms of the same or different elements rearrange themselves to form a new substance. While they do so, they either absorb heat or give it off.
Combination.
Decomposition.
Single displacement.
Double displacement.
Combustion.
Redox.
Digestion
the process of breaking down food by mechanical and enzymatic action in the alimentary canal into substances that can be used by the body.
teeth, tongue, salivary glands, liver, gallbladder, and pancreas.
Heat Transference
Heat transfer, also referred to simply as heat, is the movement of thermal energy from one thing to another thing of different temperature. These objects could be two solids, a solid and a liquid or gas, or even within a liquid or gas.
heating a tin can of water using a Bunsen burner. Initially the flame produces radiation which heats the tin can. The tin can then transfers heat to the water through conduction. The hot water then rises to the top, in the convection process.
Periodic
a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
Symbols from the periodic table are used for the individual elements examples are O for oxygen, H for hydrogen, C for carbon, N for nitrogen and Ca for calcium. An element can be a gas, solid or liquid.
Nutrition
the process of providing or obtaining the food necessary for health and growth.
An example of nutrition is the nutrients found in fruits and vegetables, a healthy diet.
Bonding
A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between atoms with opposite charges, or through the sharing of electrons as in the covalent bonds.
An example of bonding are,Ionic Bonds
Covalent Bonds
Dative Bonds
Network Covalent Bonds
Cooking
the practice or skill of preparing food by combining, mixing, and heating ingredients.
Cooking methods include: boiling, stewing, shallow frying, deep frying, barbequing and basting.
pH
figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid, and higher values more alkaline. The pH is equal to -log10 c, where c is the hydrogen ion concentration in moles per liter.
0, 10,000,000, battery acid
1, 1 000 000, gastric acid
2, 100 000, lemon juice, vinegar
3, 10 000, orange juice, soda
Solution-In chemistry, a solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.
Solute is a substance dissolved in another substance, known as a solvent.
Solvent - The component of a solution that is present in the greatest amount. It is the substance in which the solute is dissolved. Examples: The solvent for seawater is water. The solvent for air is nitrogen.
Radiation is the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.
To find a electron you need to
Get a periodic table of elements. ...
Find your element on the periodic table. ...
Locate the element's atomic number. ...
Determine the number of electrons. ...
Look for the atomic mass of the element. ...
Subtract the atomic number from the atomic mass
There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
