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Which pair of atoms has the highest electronegativity difference? Na-F Ca-F H-F C-F F-F

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A “new moon” coincides with the highest of the two spring tides. Which position is the new moon?

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Hydrogen has only one electron in its only (and outer) electron shell. If a hydrogen atom were to absorb a tremendous amount of energy where would Bohr say the electron would go? A. fly off the atom B. nowhere, it would just speed up. C. spiral inwards towards the nucleus D. move up to another shell that would form

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HURRY HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to drop? A. The molecules in the water spread apart. B. The molecules in the thermometer’s liquid spread apart. C. The kinetic energy of the water molecules decreases. D. The kinetic energy of the thermometer’s liquid molecules increases.

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HURRY HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Which best describes thermal energy? A. It is the difference between internal energies of two or more substances. B. It is the sum of internal energies of two or more substances. C. It is the portion of internal energy that can be transferred from one substance to another. D. It is the portion of potential energy that can be transferred from one substance to another.

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What happens to the potential energy of an object when it is falls from a height?

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The store energy that that an object has due to its position, condition, or chemical compositon is called

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Organisms get the energy and building materials that they need from food. what is the ultimate source of energy for food?

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Why do elements in a group on the periodic table have similar chemical properties? a. similar atomic masses b. similar atomic numbers c. same number of outermost electrons d. same number of protons

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Which of the following elements is chemically most similar to chlorine? A) helium b) sodium c) bromine d) hydrogen

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Why do elements in Period 2 have the highest electronegativity?

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What is another name for the rare earth elements? a. Group 1 c. Group 6 b. Lanthanide d. Alkaline Earth

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True or False: Heterotrophs obtain food molecules for energy and nutrition by eating heterotrophs or by eating and absorbing autotrophs

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Which of the following types of organelle is most important in providing a cell with energy? A. mitochondria B. nuclei C. vacuoles D. cell membranes

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There are two ways to transfer energy by particle transfer and by waves. Give an example of each

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Energy enables an object to do work. Work is done when

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1. Name of transportation 2. Source of energy 3. How are energy was converted 4. Disadvantages that were present

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Which part of a plant cell is responsible for converting light energy into chemical energy?

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Why is thermal energy produced not generally usable to do work

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The compounds shown below are written using the chemical symbols for the elements that they contain. The key shows the names of each element. KEY Br = bromine C = carbon Cl = chlorine H = hydrogen K = potassium O = oxygen P = phosphorus Which compound could be classified as organic? A. CH4 B. P2O5 C. KBr D. HCl

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The compounds shown below are written using the chemical symbols for the elements that they contain. The key shows the names of each element. KEY Br = bromine C = carbon Cl = chlorine H = hydrogen K = potassium O = oxygen P = phosphorus Which compound could be classified as organic? A. CH4 B. P2O5 C. KBr D. HCl

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What change occurs every time elements form a compound? A. The state of matter in the compound will change. B. Ratio of the elements in the compound will vary. C. Original properties of the elements will change. D. Elements in the compound will always dissolve.

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Which best explains why nuclear reactions release more energy than chemical reactions? A. The forces holding the nucleus together are much stronger than the forces binding electrons to atoms. B. Protons have a much higher mass than either neutrons or electrons. C. During a chemical reaction, some of the mass of the reactants is converted to energy. D. In nuclear reactions, the electrons in the atom are not involved in the transmutation.

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Which of the following elements is not likely to form bonds? A. gold B. oxygen C. neon D. mercury

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Chemical reactions that release energy A. will not occur. B. need catalysts to occur. C. will always explode. D. often occur spontaneously.

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Cooking requires continuous addition of energy to the chemical reactions that are taking place. The chemical reactions involved in cooking can be described as _________

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Complete these equations for the ionization of an Arrhenius acid or base in water. Include the states of the products. 1.) HI(aq) 2.) LiOH(s)

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Which element in each pair has a greater first ionization energy? a)lithium, boron b)magnesium, strontium c)cesium, aluminum

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Consider four elements from Group 7A: fluorine in the second period, chlorine in the third period, bromine in the fourth period, and iodine in the fifth period. Which element has the largest first ionization energy?

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ATP is considered to be an energy carrier molecule. Where is the energy actually located in this molecule? A attached to the phosphate group B in the bonds between phosphate groups C attached to the nucleotide D between the sugar and the phosphate

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