Chapter 1 * What is Chemistry? -it is the study of the composition of substances and the changes they undergo. * What are the 5 branches of chemistry? * Organic chemistry‚ inorganic chemistry‚ analytical chemistry‚ physical chemistry‚ biochemistry. * What is the difference between a theory and law? -a theory is a thoroughly tested explanation of why experiments give certain results. A scientific law is a concise statement that summarized the results of a broad spectrum of observations
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electrons. protons. neutrons. isotopes. Question 2 of 20 The structural unit that retains the properties of an element is the molecule. atom. cell. electron. Question 3 of 20 Which of the following are found in the nucleus of an atom? Protons Neutrons Electrons A and B Question 4 of 20 The component of an atom or molecule that is most important in determining its chemical properties is the isotope. neutron. electron. proton. Question
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Chromium‚ Chromiuim‚ Chromium‚ Oh my oh my‚ sweet Chromium What did Nicolas Louis Vauquelin say when he first discovered you? Did he know that you were going to have 24 protons and exactly 24 electrons? Or even 28 neutrons… No? So how did the world figure you all out? Was it because you were such a beautiful silvery transition metal? Or maybe it was your mesmerizing amount of atomic mass… Ya’ know‚ it being 51.996. Are other elements attracted to you because you are simply‚ Odorless
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Week 2 Quiz Which of these is NOT one of the four general categories of cells that make up the human body? collagen cells muscle cell neuron connective tissue cell epithelial cells What is the term for the developmental process that leads to specialized cell types? homeostasis differentiation positive feedback genomics acclimatization If a person begins to sweat upon entering a hot room but continued sweating is able to keep the body temperature constant‚ which of these best
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artificially make them in laboratories. [1][3] Explanation- How does the size of an element affect the stability? What does the term ‘stable’ mean? In atoms‚ there is a force that holds the nucleus together. It is called Binding energy. The more protons and neutrons the
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maintaining a relatively stable pH 11 : A pure substance‚ made up of only one kind of atom 12 : Dissociate to form equal amounts of hydrogen ion and hydroxide ion 13 : Number of protons in the nucleus; determines the type of atom 14 : Opposite of base 15 : When acids and bases mix and form salts Answer : Proton : Neutron : Atomic number : Element : Molecule : Compound : Water molecules : Base : Acid : Neutralization : Buffers
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explains the atomic structure and ions‚ properties of water and pH‚ organic molecules‚ chemical reactions and enzymes. With atomic structure there are three subatomic particles that form together to create an atom of an element; protons‚ neutrons‚ and electrons. Protons are positively charged and form the nucleus of an atom with neutrons that carry no charge. Electrons are negatively charged and are constantly moving around the nucleus. Ions are created when electrons move from one atom to another
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to the carbon family https://www.britannica.com/science/tin. Tin consists of 50 Protons‚ 69 Neutrons and 50 electrons. (my citation for where i got this information is the periodic table you gave to us.) The atomic number of tin is 50 because the atomic number is usually the same number of protons. The atomic mass is 118.71 u. I used my knowledge from the recent years in biology and physical science to use the protons and neutrons to determine the atomic mass. Tin is a metal because it is ductile
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Chemistry * a science that dealing with the structure‚ composition and properties of items and with the transformations that they undergo * the composition and chemical properties of a substance * chemical processes and phenomena (as of an organism) Examples: - Digestion; enzymes promoting chemical reactions that power our bodies. Lifting your arm requires your body to make and burn ATP using oxygen with carbon dioxide as one of the waste gases produced. - The internal combustion
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Science Holiday Homework Aldo 10D The Rutherford’s Experiment and the Geiger Marsden experiment were both the same experiment‚ where Rutherford being the mentor of Geiger and Marsden in the investigation of the experiment at the University of Manchester in 1909. The experiment was so important because it changes our view and understanding upon the structure of the atom. Before Rutherford‚ there was a man named Joseph John Thomson who proposed the structure of the atom. He stated that the electrons
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