Chemical Bonding
To complete this worksheet, select:
Module: Foundations Activity: Animations Title: Chemical Bonding
Introduction
1. Why are chemical bonds important? They form the structure and function of molecules in the body
2. a. Describe atomic structure. Whether or not the atom is positive or negative, the ions orbiting around the atom.
b. Explain the importance of the outer (valence) electrons relative to bonding.
combine to form chemical bonds
Covalent Bonds
3. First, explore covalent bonds.
a. Describe the electron activity. Formed when two atoms fill the outermost shell from sharing electrons
b. Describe an oxygen molecule as an example. Two oxygen atoms share the outermost electrons
…show more content…
Describe the electron activity. Formed when electrons move from atom to atom to form ions
b. Why do chlorine and sodium have charges after electron transfer? Sodium atom lost an electron now it has a positive charge because the protons are greater than electrons. Chloride gains the electron so there is a negative charge because electrons are greater than protons.
c. What causes the attraction between ions forming an ionic bond? By opposite charges of both ions
d. Describe the "strength" of ionic bonds. Use salt as your example. Ionic bonds are weak, that’s why salt can dissolve in liquids
e. How common is ionic bonding in the body? Extremely common. Our teeth and bones are aided by ionic bonding
f. How are ions important to the body? Examine each of the following in your research.
Nerve impulses - ions generate nerve impulses pH regulation - each ion has a positive or negative charge that helps in keeping our PH normal
Bone formation – each ion composes the correct amount of bonds to form bones and teeth
Hydrogen Bonds
1. Explain why water molecules have positive and negative "poles." The oxygen electrons are attracted to like electrons creation some negative charge on the oygen and positive on
* Protons and electrons have equal and opposite electrical charges. Protons are positively charged, and electrons are negatively charged.
A sodium ion (Na+) occurs when a sodium atom loses an electron and gains a positive charge
For the following molecules determine which atoms are bonded (write the symbols with a bond between them), the electronegativity difference between them, and the type of chemical bond it represents. If the bond is ionic, state what ions are produced. If the bond is polar covalent, indicate the direction of the dipole on the symbols from the first part.
To understand how this electricity works we must start with the basics. The atom is the smallest unit of matter, consisting of protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. Electric charges that are the same repel each other and charges that are different attract each other. Electric charges can exist alone, unlike magnetic poles.
If you noticed when you take your clothes out of the dryer, there is also some clothes that don’t stick together like the others do. Why don’t those stick together also? The same charges repel from each other and the same charges repel. Neutral objects attract to any charge both positive and negative. When the clothes get charged the
To determine what charges will form, compare the location on the table of the two objects. The object that is higher on the table will lose electrons and become positive Eg. when cotton and human hair rub what charge will form on each object? ___________ is lower on the list than ___________. __________ will hold its electrons better. ____________ will lose its electrons to the ________________Cotton will become ___________. Hair will become ________________Consider the following pairs are rubbed together. Give charge on each : Plastic ________ Silk _______; Fur __________ Rubber ; glass ____ silk ______
The two types of bonds that hold atoms within a compound together are ionic and covalent bonds.
When an electron is added to form an atom, this will form an anion, the added electron will repel to the other electrons and this will then result in an increase in the size of the atom that is presented.
Potassium and sodium have a positive charge, potassium found within the cells, sodium in the fluid
It takes very little energy to break these forces; therefore simple covalent compounds have very low melting points and generally appear as gases. You can also get multiple bonds; this is where atoms can share more than 2
Electrolytes each has a specific job and process. Chloride electrolyte is negatively charged, it's mainly found in the normal table salts with sodium, Chloride electrolyte takes place on the fluids outside of the cell and its close with sodium, and its job is to maintain the right balance and pressure of the various fluid compartments of the body like blood, the inside cells and also the fluid between the cells. Chloride is also important in maintaining the proper acidity in the
Atoms consist of three main components: neutrons (no charge), electrons (negative charge) and protons (positive charge). The change on an electron is -1.6 x 10-19Coulombs. Coulombs (C) are the unit of charge used which is defined as the electric charge carried by 1 ampere of current in 1 second.9 All objects are comprised of atoms creating an overall charge which in most cases is neutral, although objects that have excess electrons create an overall negative charge whereas an object with fewer electrons has an overall positive charge. According to the law of electrostatics, atoms with unlike charges attract, while like charges cause the particles to repel. As electricity is a flow of negatively charged particles, when placed in a circuit, the particles will flow from the negative terminal to the positive terminal due to being repelled from the
• Electric charge is an intrinsic property of the elementary particles that make up atoms. • Atoms • Nucleus consisting of protons (positive charge) and neutrons (no charge) • Electrons (negative charge) orbit the nucleus. • Like charges repel, while opposite charges attract. • Everyday objects have equal amounts of positive and negative charge, so they have no net charge.
The outer shell of electrons that orbit the nucleus of an atom is called the valance shell. This is what makes a copper atom conduct. For a copper atom the number of electrons is one. When a charge of electricity is placed in the end of a wire the electrons move into the wire. Since there is only one electron in the valance shell of a copper atom it can be easily dislodged with a small amount of energy causing it to jump to the next atom. This will then cause the valance electron of that atom to jump to the next atom and so forth. This movement happens very fast making it possible for a large number of electrons to move through the wire. An example of a conductive atom is shown figure 1.
What particles are found in the nucleus? Two particles one is uncharged and other is the same as the mass