Chem 1030 Exam 1 Prado Questions And Answers Verified 100% Correct

Chem 1030 Exam 1 Prado Questions And Answers Verified 100% Correct a pure substance made up of 2 or more different atoms held together by a chemical bond - ANSWER -compound a force that holds atoms together - ANSWER -chemical bond atom or molecule that has a positive or negative charge - ANSWER -ions structural formula - ANSWER - chemical formula - ANSWER - ball and stick model - ANSWER - space filling model - ANSWER - white - ANSWER -hydrogen red - ANSWER -Oxygen black - ANSWER -carbon blue - ANSWER -nitrogen agreement or closeness of a series of measured values - ANSWER -precision agreement or closeness of measured value to actual known value - ANSWER accuracy counted values or identified conversion factors - ANSWER -exact numbers have uncertainty - ANSWER -measured values SI base unit for mass - ANSWER -kilogram SI base unit for length - ANSWER -meter SI base unit for temperature - ANSWER -Kelvin SI base unit for time - ANSWER -second SI Base unit for electric current - ANSWER -ampere SI base unit for quantity of a substance - ANSWER -mole kilo - ANSWER -k. 1 km= 10^3 m deci - ANSWER -d. 10^1 dm= 1m centi - ANSWER -c. 10^2 cm = 1 m milli - ANSWER -m. 10^mm = 1m 1 unit - ANSWER -1000 m units 1 g - ANSWER -1000 mg 1 L - ANSWER -1000 mL smallest quantity of matter that still retains the properties of matter - ANSWER atom substance that cannot be broken down into 2 or more simpler substances by any means - ANSWER -element used a cathode ray tube to discover the first subatomic particle discovered electrons by how they run through batteries beam deflects toward the positive electric field so charge is negative opposites attract - ANSWER -J J Thomson -5.6856 x 10^-12 kg/c - ANSWER -mass to charge ratio determined mass of an electron if the molecules fall slowly, they have a strong charge qE = -mg - ANSWER -milikan's oil drop experiment 9.110 x 10^-31 kg - ANSWER -mass of an electron electrons distributed throughout diffuse positively charged sphere FALSE - ANSWER -thomson's plum pudding model directed the positively charged particles at an ultra thin sheet of gold foil matter must not be as uniform as it appears contains large regions of empty space with small regions of very dense matter - ANSWER -rutherford's experiment: gold foil experiment nuclear atom comparison with - ANSWER -jordan hare stadium nucleus composed of - ANSWER -protons and neutrons orbit the nucleus - ANSWER -electrons number of protons - ANSWER -atomic number number of protons and neutrons - ANSWER -atomic mass unit used to express the relative masses of atoms and subatomic particles - ANSWER -atomic mass units (amu) 1.66054 x 10^-27 kg - ANSWER -1 amu = 1 dalton atoms of an element containing the same number of protons but different number of neutrons - ANSWER -isotopes a specific isotope of an element - ANSWER -nuclide 1 or 2 letter symbol to identify the type of atom - ANSWER -elemental symbol determines identity of element - ANSWER -atomic number the number of electrons in a neutral atom is equal to the number of protons in its nucleus (designated by its atomic number Z) - ANSWER -ions in chemical changes, atoms can lose or gain electrons and become charged particles - ANSWER -ions