1. cannot be separated by physical or chemical means. 2.Elements are abbreviated with which consist of one or two 3. Elements are organized on the according to their 4. Two or more elements chemically combined make up a 5.. is an example of an element and is an example of a compound. 6. Elements and compounds are called have a unique set of chemical and physical substances because they

1. cannot be separated by physical or chemical means. 2.Elements are abbreviated with which consist of one or two 3. Elements are organized on the according to their 4. Two or more elements chemically combined make up a 5.. is an example of an element and is an example of a compound. 6. Elements and compounds are called have a unique set of chemical and physical substances because they

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Part A According to the Atomic Theory, all matter is made up of tiny particles called electrons. a compound can contain different numbers of atoms as long as it has the same kinds of atoms. atoms of the same element combine to form compounds. atoms are neither created nor destroyed during a chemical reaction. all atoms are different.
NAME________________________________________________DATE: 112020 Devise a system of chemical symbols that is easy to use by answering the questions below. Look up the symbols for the following elements: hydrogen . . . . . . . . . . . . . . . . . _______________ oxygen . . . . . . . . . . . . . . . . . . . _______________ nitrogen . . . . . . . . . . . . . . . . . . _______________ carbon . . . . . . . . . . . . . . . . . . . _______________ sulfur . . . . . . . . . . . . . . . . . . . . _______________ fluorine . . . . . . . . . . . . . . . . . . _______________ iodine . . . . . . . . . . . . . . . . . . . _______________ phosphorus ............... _______________ What rule was used to come up with these symbols? Look up the symbols for the following elements: calcium . . . . . . . . . . . . . . . . . . _______________ cadmium . . . . . . . . . . . . . . . . . _______________ cesium ................... _______________ cerium . . . . . . . . . . . . . . . . . . . _______________…
Atomic Theory & Scientists 1. Write the letter of each sentence that is true about Dalton's atomic theory. a. All elements are composed of tiny, indivisible particles called atoms. An element is composed of several types of atoms. b. c. Atoms of different elements can physically mix together, or can chemically combine in simple, whole-number ratios to form compounds. d. Chemical reactions occur when atoms are separated, joined or rearranged; however, atoms of one element are never changed into atoms of another element by a chemical reaction.
The neutral hydrogen atom consists of a. one proton and one neutron. b. one proton, one neutron and one electron. c. one proton and one electron. d. one proton. e. an isotope and an ion.
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Which of the following statements best describes the elements in Group 8A (18) of the periodic table? a. They are all liquids under normal conditions. b. They exist naturally as single atoms. c. They form ions of variable charge. d. They exist as diatomic molecules.
The mass ratio of chlorine to the mass of copper is equal to 5.5. Another sample of copper chloride contained 16.5 chlorine when decomposed .. Calculate the amount of copper in the other sample ??
A 25.0 g sample of sucrose is found to contain 51.4% by mass oxygen. A second sample of sucrose (250. g) is found to contain 51.4% by mass O. This s consistent with : a.Law of Multiple Proportions b. Boyle's Law c. Law of Constant Composition d. Law of Conservation of Mass e. 1st assumption of Dalton's Atomic The
Law of constant proportion example (can be easily drawn)
what does the law of multiple proportions mean?
1. Which pair could be used to demonstrate the law of multiple proportions a. H2O and H2O2 b. NaCl, NaBr c. CaBr2 and MgBr2 d. None of the above 2. What is a property of a solid? a. Solids have a definite shape b. Solids do not have a definite volume C. Solid particles have more freedom to move than a liquid d. Solids are compressible 3. Which one of the following is a physical property? a. Toxicity b. Rusting c. Explosion d. Temperature ch 1
QUESTION 31 A substance composed of two or more elements in a fixed, definite proportion is O A. a homogeneous mixture B. a heterogeneous mixture O C. a compound O D. a solution QUESTION 32 Bonds are made by sharing or transferring by the atoms. O A. protons O B. electrons OC. neutrons O D. photons QUESTION 33 Potassium (K) is a/an O A. noble gas OB. transition metal O C. alkali metal O D. alkaline earth metal