Chemistry Quiz

How many significant figures are in 0.000 300 500 kg?

Answer explanation

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?

Answer explanation

600 m = 6.0x10^2 m^3

What did JJ Thomson discover?

Answer explanation

electron

What was significant about Rutherford’s gold foil experiment?

Answer explanation

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?

Answer explanation

proton= +1 electron=-1 neutron=0

What is an isotope?

Answer explanation

atoms of the same element with different number of neutrons

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

Answer explanation

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.

Answer explanation

ruthenium p=44 e=44 n=59

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

Answer explanation

5

Identify an element with four valence electrons.

Answer explanation

C, Si, Ge