Science 9 Review Test

The negatively charged sub-atomic particles are called what?

• Atom

• Proton

• Neutron

• Electron

Who proposed the planetary model of the atom?

• Ernest Rutherford

• John Dalton

• Neils Bohr

• J.J. Thomson

The energy of electrons is the main determinant of what property in atoms?

• The location of the electron

• The interaction between electrons

• Both a and b

• Neither of the two

When Calcium combines with Chlorine, it loses two electrons. What could be the charge of Calcium after losing 2 electrons?

• +2

• -2

• -1

• +1

Which of the following orbitals can hold up to 6 electrons?

• s

• p

• d

• f

Which of the following elements have the electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2?

• Mn

• F

• S

• Ca

Which electron configuration of an element is incorrect?

• B5: 1s2 2s2 2p2

• Cl7: 1s2 2s2 2p6 3s2 3p5

• Na11: 1s2 2s2 2p6 3s1

• Ne10: 1s2 2s2 2p6

Element with the electron configuration 1s2 2s2 2p6 3s2 3p6

• Ar

• Ca

• O

• P

Among the sub-levels below, which is not designated properly?

• 3d10

• 5f18

• 2p6

• 1s2

What is the electron configuration of Oxygen?

• 1s2 2s2 2p4

• 1s2 2s2 2p2

• 1s2 2s2 2p2 2p2

• 1s2 2s2 2p1