According to VSEPR theory, repulsion between electron pairs in filled shells are larger than the repulsion between electron pairs in incompletely filled shells. In H2O, there are four orbitals in valence shell (one 2s and three 2p) and they are

The main types of chemical bonds are ionic bonding, covalent bonding and metallic bonding. Covalent Bonding A covalent bond is a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms, and other covalent

What is meant by polarity of molecules? What causes differences in polarity? The polarity of molecules is the slight charge associated with a covalent molecule due to the uneven sharing of electrons. Electrons, being the source of mobile charge within

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Radioactive isotopes (radioisotopes) are isotopes which are atoms of the same element that are chemically identical but vary in the number of neutrons they contain. Radioactive isotopes can participate in reactions just like non radioactive elements. Autoradiography is a technique

The word atom is derived from the Greek word atom which means indivisible. The Greeks concluded that matter could be broken down into particles too small to be seen. These particles were called atoms. Atoms are composed of three types

But often the device simply acts as the electronic equivalent of an on-off switch. When on, it completes a circuit and lets current flow; when off, it breaks the electrical path. • lone transistors suck- strength in numbers • Transistors

Concept Explorations 2. 25. Average Atomic Mass Part 1: Consider the four identical spheres below, each with a mass of 4. 00 g. a. Calculate the average mass of a sphere in this sample. (4. 00 + 4. 00 +

The purpose of this lab was to explore how electron configurations vary around the periodic table. The lab also helped us examine the relationships between electron configurations and reactions. Analysis The first pattern we discovered was that the sum of

Lab Report Electrical Conductivity Introduction There are some substances that are capable of conducting electricity, and the reason they conduct electricity is because of the type of compound the substance is. Electrolytes or any ionic compound conduct electricity and nonelectrolytes

Flame Tests Atomic Emission and Electron Energy Levels AES, or atomic emission spectroscopy, is a method which chemically analyzes the particular wavelength of a sample element to identify and determine the abundance of this certain element. The wavelength of the

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