CHEM 120 unit 1 Questions and Answers 100% Solved

CHEM 120 unit 1 Questions and Answers
100% Solved

How many protons does it have? 14




1 deciliter = 0.1 L




1g= 0.001 kg




1 nanometer = 10-9 m




1 milliliter = 0.001 L




1 microliter = 0.000001 L




1m= 100 cm




1 kilometer = 1000 m

, 1 megagram = 1,000,000 g




1L= 1000 mL




1 centigram = 0.01 g




1L= 1,000,000,000 nL




How many neutrons are in a neutral atom of Zn if it has 30 electrons and a mass number of 65?

35




What is the atomic number of an element with 19 protons and 20 neutrons? 19




What is the mass number of an element with 20 electrons and 22 neutrons? 42




How many neutrons are in a neutral atom of Cr (atomic number 24) if it has a mass number of

52? 28