GED Science : Elements and Compounds
Study concepts, example questions & explanations for GED Science
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Example Questions
Example Question #2 : Chemistry
Which of the following types of chemical bonds is very strong and involves transfer of an electron between atoms?
Ionic bonds
Disulfide bonds
Covalent bonds
Hydrogen bonds
Ionic bonds
There are two primary bond types: ionic bonds and covalent bonds. Ionic bonds involve the transfer of an electron between atoms, while covalent bonds require atoms to share an electron between them. Ionic bonds are the stronger of the two. Ionic bonds usually form between a metal and a non-metal (for example, NaCl), while covalent bonds usually form between two non-metals (for example, HCl).
Hydrogen bonds are a type of intermolecular force and are similar to a very weak covalent bond. Hydrogen bonds are not actual bonds, and do not chemically link atoms together; they are strictly physical interactions. Disulfide bonds are covalent bonds between sulfur atoms that help form protein structure.
Example Question #2 : Chemistry
On the periodic table, carbon is atomic number 
The standard sub-atomic particles are protons, neutrons, and electrons. Protons and neutrons are found in the nucleus, while electrons move freely around the nucleus. This question is specifically asking about the number of protons and neutrons in an atom of carbon.
Each proton and each neutron has a mass of approximately 
The atomic number refers to the number of protons in the nucleus of the atom. Since the atomic number of carbon is six, there are six protons in the nucleus. For this question, however, we need the total of both the protons and neutrons (not just the protons).
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