1. Explain the connection between your health and what you breathe. -Clean unpolluted air keeps us alive and healthy, that is why it’s important for us to keep our environment clean 2. Describe air in terms of its major components, their relative amounts, and the local and regional variations in the composition of air. -Major components of air are: nitrogen, oxygen, argon, carbon dioxide, and water vapor. The composition of air by volume is about 78% nitrogen, 21%oxygen, and
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October 5, 2015 6. Briefly describe the structure and size of an atom. How big is the nucleus in comparison to the entire atom? Atoms are extremely small; millions of atoms could fit end to end across a period at the end of a sentence. Protons and neutrons are found in the tiny nucleus at the center of the atom. The rest of the atom’s volume is made up of electrons, which surround the nucleus. The nucleus is very small compared to the atom as a whole, but it contains a majority of the atom’s mass.
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A caffeine molecule consists of 4 different elements. These are carbon, hydrogen, nitrogen, and oxygen. The molecular formula for caffeine is C8H10N4O2. A neutron is subatomic particle about the same mass as a proton but without an electric charge. A proton is a stable subatomic particle occurring in all atomic nuclei, with a positive charge equal to an electron, but with an opposite sign. An electron is a stable subatomic particle with a charge of negative electricity. One carbon atom contains 8
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Water is a very small molecule consisting of the two most common reactive elements known (3), these are two hydrogen atoms covalently bonded to one oxygen atom. However, shared electrons in water are not evenly shared. Oxygen attracts electrons much more strongly than hydrogen, this results in a slight positive charge on the hydrogen atom and a slight negative charge on the oxygen atom. These charge difference lead to hydrogen bonding, this is where slightly negatively charge atom
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Atom, Molecules and Elements Ions: an atom or group of atoms that has an electric charge. Isotopes: an atom with different numbers of neutrons in their nucleus. (These extra neutrons have NO EFFECT ON THE CHEMICAL PROPERTIES of the atoms but they do affect the weight of the atom.) Particle Location Weight Charge Proton Nucleus 1 amu Positive Neutron Nucleus 1 amu Neutral Electrons Electron Cloud 0 amu Negative Valence electrons: electrons in the outermost shell of an atom. Atomic
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ORGANIC CHEMISTRY. THE SHAPES OF MOLECULES. FUNCTIONAL GROUPS I n this chapter we first briefly review the most important types of covalent bonds encountered in organic substances and the ways in which these bonds are represented in structural formulas. Next we consider the sizes and shapes of organic molecules and how structural formulas written in two dimensions can be translated into three-dimensional models that show the relative positions of the atoms in space. We also discuss models
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geological, and chemical processes. * There are a few types of atoms that can be a part of a plant one day, an animal the next day, and then travel downstream as a part of a river’s water the following day. These atoms can be a part of both living things like plants and animals, as well as non-living things like water, air, and even rocks. The same atoms are recycled over and over in different parts of the Earth. This type of cycle of atoms between living and non-living things is known as a biogeochemical
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the acceleration a body has when a force is applied. The greater the mass, the slower the acceleration for the same force. Matter is thus a general term for the substance of which all observable physical objects consist. Typically, matter includes atoms and other particles that have mass, but this definition confuses mass and matter, which are not the same. Different fields use the term in different and sometimes incompatible ways; there is no single agreed scientific meaning of the word "matter,"
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Benefits of the Ozone Gas Ozone (O3) is a natural gas comprising of three oxygen atoms and is a particularly an unstable fume. Ozone gas is visibly blue in color and has a sturdy odour regularly described as the whiff of air after a springtime electrical thunderstorm. Some people also refer to the odour as like the smell of watermelons. Normal oxygen (O2), which living beings except plants breathe, has dual oxygen atoms and is invisible and odourless. Despite its being a natural gas ozone can be manufactured
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Although I took biology class back in high school, I never truly paid attention or really understood the material. Taking this course helped me learn more about the scientific method, atoms the chemical bonds, the importance of water, and the macromolecules. An observation is always the first step to the scientific method. Collecting data helps understand the full detail of the experiment. A hypothesis would then need to be formed. It’s the question to be studied through experiments. Experiments
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