Chemistry Quiz

How many significant figures are in 0.000 300 500 kg?

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6

A swimming pool is measured to be 25.0 m long, 12.00 m wide and 2.0 m deep. What is the volume of the swimming pool?

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600 m = 6.0x10^2 m^3

What did JJ Thomson discover?

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electron

What was significant about Rutherford’s gold foil experiment?

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discovered an atom is mostly empty space and has a small, dense, positively charged center called nucleus

What are the three subatomic particles and provide their charges?

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proton= +1 electron=-1 neutron=0

What is an isotope?

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atoms of the same element with different number of neutrons

How many protons, neutrons and electrons are in aluminum-27?

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p=13 n=14 e=13

An element has a mass number of 103 and an atomic number of 44. Identify the element, write the isotopic notation and determine the number of protons, neutrons and electrons.

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ruthenium p=44 e=44 n=59

How many electrons are located in the p orbitals of F?

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5

Identify an element with four valence electrons.

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C, Si, Ge