Metalloids Study guides, Class notes & Summaries

Intensive property A physical property of a substance that is not dependent on the size of mass of a sample, and cannot be determined by looking at the substance. Ex: density, mp, bp, temperature. Extensive property A physical property that depends on the amount of matter in a sample. Ex: mass, volume. Chemical property How a substance will change when it reacts with other substances and changes its chemical identity. Ex: flammability, oxidation state, toxicity. Periodic table -Arranged...

NAS 2 CHALLENGE TEST Exam Questions With Answers (Verified And Answers) Purpose of the scientific method - answeran organized way to solve a problem or answer a question independent variable - answera variable that the researcher controls and is not affected by other variables ex: amount of water a plant receives What are the steps of the scientific method? - answer1. question 2. Hypothesis 3. experiment 4. observation 5. analyze 6. conclusion dependent variable - answera variable t...

CHEM 1201 EXAM 1 Kizilkaya LSU With 100% Correct And Verified Answers 2024 matter - Correct Answer-anything that occupies space pure substance - Correct Answer-elements or compounds that cannot be broken down mixture - Correct Answer-combination of 2 or more substances that can be heterogenous or homogenous physical property - Correct Answer-can be observed without changing the identity and composition chemical property - Correct Answer-can be observed only when the substance is cha...

NAS 2 CHALLENGE TEST Exam Questions With Answers (Verified And Answers) Purpose of the scientific method - answeran organized way to solve a problem or answer a question independent variable - answera variable that the researcher controls and is not affected by other variables ex: amount of water a plant receives What are the steps of the scientific method? - answer1. question 2. Hypothesis 3. experiment 4. observation 5. analyze 6. conclusion dependent variable - answera variable t...

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...

ACS General Chemistry First Term Final 38 Questions with Verified Answers Temp Conversions: Kelvin - CORRECT ANSWER K= C°+273.15 Farenheit - CORRECT ANSWER F°= 9/5(C°)+32 Celsius - CORRECT ANSWER C°= (F°-32) 5/9 Significant Figure Rules - CORRECT ANSWER 1. Leading zeros not sig 2. Zeros btw 2 digits are sig 3. Trailing zeros to right of decimal are sig 4. Trailing zeros before decimal are sig How many sig figs? 0.0005004 - CORRECT ANSWER 4 sig figs How many sig figs? ...

CHM 1020 Exam 1 Latest Update Graded A+ elements one of the 100 pure substances in our world from which compounds are formed compound pure substance made up of two or more different elements in a fixed, characteristic chemical combination mixture physical combination of two or more pure substances metal shiny elements, conduct heat and electricity very well metalloids (8) elements between metals and nonmetals nonmetals do not conduct heat or electricity well, no one characteristic groups v...

IPC REVIEW PRACTICE EXAM GUIDE TEST 2024. 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 Mend...

Chemistry Cumulative Exam Questions With Complete Solutions What is chemistry ️️the study of matter and the changes it undergoes What are elements classified as? ️️metals, nonmetals, metalloids Can elements be broken down? ️️No What are the diatomic molecules? ️️H2, N2, O2, F2, Cl2, Br2, I2 What are mixtures ️️Substances containing two or more different elements that are not chemically bonded together

ALEKS PLACEMENT TEST: CHEMISTRY WITH COMPLETE SOLUTIONS 100% 2023/2024 Matter Anything that has mass and takes up space; made of atoms Atoms Basic unit of matter which cannot be broken down and contain mostly empty space; contains three parts: the electron, proton, and neutron Elements A pure substance that contains only one type of atom Compound Two or more elements that are chemically bonded; includes ionic and covalent Mixture Two or more substances that are together...