A) ecosystem, population, organ system, cell, community, molecule, organ, organism, tissue B) cell, molecule, organ system, organ, population, tissue, organism, ecosystem, community C) organism, organ system, tissue, population, organ, community, cell, ecosystem, molecule D) molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem E) ecosystem, molecule, cell, tissue, organism, organ system, organ, community Answer:
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1. Atoms are a small unit of matter that retains the properties of an element. Atoms consist of positive protons and neutral neutrons which make a nucleus, and negatively charged electrons which orbits around the nucleus in a clouds. Protons Neutrons Electrons Charge Positive Neutral negative Location in atom Nucleus Nucleus Cloud/shell Size Same as neutrons smaller than electrons About the same as a proton Smaller than both protons and neutrons Function They determine the element Stabilize
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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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1. a) The trend I notice from hydrogen to the highest numbered atom is that the atomic size increases as you go left from the element, and it decreases once you go up a group. b) Across a period, the size of an atom decreases (left to right). The increased positive charge in the nucleus has a greater attractive force for the outer valence electrons in the same energy level c) Up a group, the size of an atom decreases. The attractive force between the positive charge in the nucleus and the valence
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|1s22s22p63s23p63d104s1 |Copper (11) | 2. What is a molecule? Give 3 examples for diatomic molecules and draw their Lewis dot structures. In your structures, show the lone pair of electrons (unshared) and shared pair of electrons. A molecule is a neutral group of atoms joined together by covalent bonds. 3) Cobalt, a
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Human Biology Week 1: Worksheet 1. Consider the organization of life. Identify the different levels of organization from the cell to the organism. -The cell is the smallest unit displaying the properties of life that is the basic structural and functional unit of organisms. -Tissues are a group of similar cells that performs similar functions. - Organ is a structure that contains at least two different types of tissues that work together for a common purpose. -Organ system is a group of
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IncorrectQuestion 1 0 / 1 pts Which of these is an example of homeostasis? Hummingbirds prefer to feed on nectar from red flowers. Homeostasis is the maintenance of the body's internal state within a relatively narrow range. When the dog's body temperature becomes too high, the animal feels hot. He opens his mouth, lets his tongue loll out, and pants until he feels comfortable again. A shark can detect even minute quantities of blood in the water. Venomous coral snakes and harmless
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the total mass of an atom or “the average of the mass numbers of a representative sample of atoms of an element” under normal conditions (Life). Valence is the capacity of an atom to bond. This is normally the number of unpaired electrons in the outermost electron shell. They want a buddy to pair with so that they may happily balance
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that contains the same number of atoms as 12.0g of carbon -> 6.022 x 10^23 (Avogadro’s number) * Avogadro’s number – 6.022 x 10^23 * How to determine how many atoms of each element is in a compound: * (moles or grams)(6.022x10^23)(Number of atoms/1molecule) * Molar mass - Molar mass is the weight of one mole (or 6.022 x 1023 molecules) of any chemical compounds. * Mass % of an element in a compound: * ((Number of atoms of element)(atomic weight))/(Formula weight)
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chlorine a greenish gas, bromine a red-brown liquid and iodine a black solid o Fluorine is small and leads to the repulsion between non-bonding electrons because they are so close together o The atoms get bigger as we go down the group because each element has one extra filled main level of electrons compared with the one above it |Halogen |Atomic number |Electron Arrangement |Electronegativity |Atomic radius nm |Melting point K |Boiling
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