Alkaline earth metals Study guides, Class notes & Summaries

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Stem Final Exam Questions & Answers 2023/2024 In the compound MgCl2 the subscript 2 indicates? - ANSWER-there are two chloride ions for each magnesium ion Describe the properties of sodium chloride? - ANSWER-liquid, sodium chloride is a good conductor of electric current A typical property of an iconic compound? - ANSWER-tendency to shatter when struck when two atoms of the same nonmetal react, they often form? - ANSWER-diatomic molecule alkali metals, alkaline earth metals, ala...

Isotopes - Same number of protons and electrons but different number of neutrons. Therefore, different mass. Ex: N=18 A=18+17=35 => Cl-35 N=20 A=20+17=35 =>Cl-37 Relative mass=Atomic Mass - Weighted avg= sum(mass of isotope)(fraction of atoms) Ex: Chlorine 3/4 are Cl-35, 1/4 are Cl-37 Atomic Mass=(35*.75)+(37*.25)=35.5 Identify - Alkali metals (H not alkali metal) Alkaline earth metals Transition metals Triels/Icosagens: boron group Tetrels/Crystallogens: carbon group

sig fig zeros - Answer-1. zeros at beginning NOT signif 2. zeros between ARE SIGNIF 3. zeros at end of number are signif if number contains a decimal point 3.489 x (5.67-2.3) - Answer-3.489 x 3.(3)7 11.75793 12 matter - Answer-composed of mass and must occupy space scales of matter - Answer-macroscopic, microscopic, particulate. scientists think on a particulate scale, observe macroscopically states of matter - Answer-1. change from solid to liquid to gas as temp increases 2. motion of...

Rutherford's Gold Foil Experiment - proposed that atoms consist of a tiny, massive, positive nucleus surrounded by electrons nucleus - contains all the positive charge and nearly all the mass of the atom James Chadwick - discovered the neutron cathode rays - move from negative electrode to positive electrode (like electrons in a voltaic cell) Thompson's Cathode Ray Experiment - discovery of the electron (also the discovery that atoms are divisible into smaller particles) Milliki...

ATI TEAS 7 CHEMISTRY EXAM QUESTIONS AND ANSWERS 2023/2024 Matter - CORRECT ANSWER-Anything that has mass and takes up space. Mass - CORRECT ANSWER-the quantity/measure of the amount of matter in an object. Volume - CORRECT ANSWER-amount of space an object takes up. How can you determine if matter is solid, liquid, and gas? - CORRECT ANSWER-It can be determined by how far apart the molecules are and how fast the molecules are moving. Solid - CORRECT ANSWER-fixed shape and volume Liqui...

Hydroxide - Answer-OHAcetate - Answer-C₂H₃O₂⁻ Nitrate - Answer-NO₃⁻ nitrite - Answer-NO₂⁻ Oxide - Answer-O²⁻ Sulfide - Answer-S²⁻ Sulfite - Answer-SO₃²⁻ Sulfate - Answer-SO₄²⁻ Carbonate - Answer-CO₃²⁻ Chromate - Answer-CrO₄²⁻ Dichromate - Answer-Cr₂O₇²⁻ Permanganate - Answer-MnO₄⁻ Bicarbonate - Answer-HCO₃⁻ Bisulfite - Answer-HSO₃⁻ Ammonium - Answer-NH₄⁺Ammonia - Answer-NH₃ Hydrochloric Acid - Answer-HCl Nitric Aci...

TCEQ Class D Water Operator License Exam Questions and Answers Latest 2024/2025 | 100% Correct | Graded A+. Drought is an extended period when a region receives a deficiency in its ________ water supply. (Ans- atmospheric, ground, or surface T/F: Only about 1 gallon of tap water per person/day is used for drinking and cooking (Ans- True Excluding outside water use, the average household uses about _______ gallons of water per month for inside use (Ans- 2,000 T/F: Only 3% of all the fres...

IPC practice test questions Periods - correct answer Each horizontal row of the periodic table. Groups / families - correct answer Each vertical column. Have similar chemical properties and similar electron configurations. Demitri Mendeleev - correct answer Made the first periodic table. He was writing a textbook and wanted to organize the 63 elements known at that time. He based his organization similar to the card game of solitaire. Increasing mass - correct answer Mendeleev organize...

matter - any solid, liquid, gas, or plasma that occupies a space and has mass homogeneous mixture - mixture that is uniform throughout (solution) heterogeneous mixture - mixture that is not uniform throughout atoms - smallest unit of an element element - many atoms of the same type; most basic building blocks compounds - different elements bonded together (pure substance) chemical symbols - one or two letter abbreviation for elements (atomic symbols) group - vertical columns on periodic t...