Atoms and the scientific method

Question 1 of 10

Chlorine is 75% chlorine-35 and 25% chlorine-37. What is its relative atomic mass?

Question 2 of 10

The scientist who discovered the electron was

Question 3 of 10

A sodium atom has atomic number 11 and mass number 23. How many neutrons does it have?

Question 4 of 10

The number of protons in an atom is its

Question 5 of 10

Which particle has a relative charge of −1 and almost no mass?

Question 6 of 10

The neutron was discovered by

Question 7 of 10

The quantum number that describes the shape of an orbital is the

Question 8 of 10

Dalton's atomic theory stated that atoms

Question 9 of 10

The maximum number of electrons in the n = 3 shell is

Question 10 of 10

According to Hund's rule, electrons fill degenerate orbitals