1Q~ Identify and describe the three parts of an element responsible for identifying it. QA~ Electons, Neutrons, and Protons. 2Q~ Identify two things the atomic number tells us. QA~ Electrons and Protons. 1Q~ Identify two things the atomic number tells us. QA~ Electons and Protons. 2Q~ Explain how matter, elements, and atoms are related. QA~ Matter creates atoms and atoms create elements. 1Q~ Explain how matter, elements, and atoms are related. QA~ Matter creates atoms and atoms create
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have similar properties. The periodic table is arranged by periods and groups. The atomic number usually increases when moving across a row or period. The atomic structure of an atom consists of an electron, a proton, and a neutron. Electrons have light particles and a negative charge. Protons have heavier particles and have a positive charge. Neutrons also have heavier particles but do not a charge thus being neutral. Elements are commonly classified ad metals, nonmetals, or metalloids. The trend
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1. An oxygen atom has eight protons. (a) Sketch in the arrangement of electrons around the nucleus of the oxygen atom in the following diagram. (b) How many more electrons will it take to fill the outermost energy level? 2. What is the following type of decomposition reaction called? A–B–C–D + H2O → A–B–C–H + HO–D 3. The subatomic particle with the least mass (a) carries a negative charge, (b) carries a positive charge, (c) plays no part in the atom’s chemical reactions, (d) is found only
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particles Periodic table: what it is, uses, information contained in it Names of certain groups (columns) in the periodic table (covered in class) Elements, compounds, mixtures (homogeneous and heterogeneous) Metals, non-metals, metalloids Isotopes; protons, neutrons, and electrons in atoms and
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A unit of matter, the smallest unit of an element, consisting of a dense, central, positively charged nucleus surrounded by a system of electrons, equal in number to the number of nuclear protons, the entire structure having an approximate diameter of 10-8 centimeter and characteristically remaining undivided in chemical reactions except for limited removal, transfer, or exchange of certain electrons. The history of the study of the atomic nature of matter illustrates the thinking process that goes
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Accomplishments of Dr. Segrè i The Life, Times and Accomplishments of Dr. Emilio Segrè Zachary Gaston English 1010-02 Dr. Bray November 24, 2008 Accomplishments of Dr. Segrè 1 Emilio Segrè was born in Tivoli, Italy on February 1st, 1905. His parents were Giuseppe Segrè, the manufacturer, and Amelia Treves, his mother. His father ran a papermaking and hydroelectric plant and his uncles were scholars, lawyers
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because of its atomic structure. The periodic table consists of one hundred eighteen elements in total. Neon is one of those elements within the Periodic table and NE symbolizes this element. Neon has an atomic number of 10 which is the number of protons in the nucleus and an atomic weight of approximately 20 which is the average mass of the atom. The interesting fact is that Neon gets its name from the Greek word “Neos” which means new. The element Neon was discovered by a Scottish chemist named
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1. The different levels of organization are listed as follows: Cell- the structural and functional unit of all living things Tissue – a group of cells with a common structure and function Organ – composed of tissues functioning together for a specific task Organ System – composed of several organs working together Organism – an individual; complex individuals contain organ systems. Population – organisms of the same species in a particular area. 2. 7 basic characteristics of life are
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definition defines acids as substances which increase the concentration of hydrogen ions (H+), or more accurately, hydronium ions (H3O+), when dissolved in water. The Brønsted-Lowry definition is an expansion: an acid is a substance which can act as a proton donor. By this definition, any compound which can easily be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent
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Atoms are building blocks, all matter is composed of indivisible particles called atoms. All atoms consist of subatomic particles called; protons, neutrons and electrons. Atoms cannot be created or destroyed but can be rearranged to from different substances. Compounds and elements are composed of tiny particles known as molecules, molecules are specified as atoms that are affiliated (combined) by chemical bonds—the joining of two or more atoms. Compounds are molecules containing at least two or
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