9. Complete the following table: (6 points) Element #protons #electrons #neutron

Question

9. Complete the following table: (6 points) Element #protons #electrons #neutrons A. Co (Z-27; A 60) 33 Rn-222 (Rn= Radon) _ca--INe LCULATIONS: SHOW COMPLETE WORK. B E SURE TO INCLUDE UNITS HERE NEEDED. ROUND OFF ANSWERS TO PROPER NUMBER OF SIGNIFICA GURES. Rewrite each of the following numbers in Scientific notation with three significant figures: (4 points) A. 549.855 B. 0.0024425 You buy a 5.00 lb bag of sugar. How much is this in milligrams? (10 points) A. A gold-colored metal object has a mass of 365 g and a volume of 22.12 cm3. Calculate its density. (10 points) density m 365 - Ilo.S /em

Explanation / Answer

# Scintific notation

A . 549.855 = 5.49855 X 102

B. 0.0024425 = 2.4425 X 10-3

# lb to mg

1 lb = 453.592 gm then 5 lb sugar

= 453.592 X 5 = 2267.96 gm

1 gm = 1000 mg then

2267.96 gm = 2267.96 X 1000 = 2267960 mg

therefore

5 lb sugar = 2267960 miligram sugar

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