Unit 7 Review Quiz

Based on the information provided, what group of elements did William Ramsey discover?

• Group 1

• Group 15

• Group 17

• Group 18

What is the physical property of gold that led Rutherford to select it for his experiment?

• Gold is ductile.

• Gold is unreactive.

• Gold can be flattened.

• Gold has a positive charge.

Which of the subatomic particles does not identify a substance as a specific element?

• atom

• proton

• electron

• neutron

What is the total number of neutrons in an atom of potassium (K) with an atomic number of 19 and a mass number of 39?

• 20

• 19

• 39

• 58

What is the total number of electrons in an atom with an atomic number of 13 and a mass number of 27?

• 13

• 14

• 27

• 40

Based on Mendeleev's arrangement of elements, which elements should be placed in the shaded boxes labeled X and Z respectively?

• Indium (In), because it has a slightly higher atomic mass than aluminum (Al), and tin (Sn), because it has a slightly higher atomic mass than silicon (Si)

• Cadmium (Cd), because it has chemical properties similar to those of zinc (Zn), and mercury (Hg), because it has chemical properties similar to those of arsenic (As)

• Antimony (Sb), because it has a slightly higher atomic mass than zinc (Zn), and bismuth (Bi), because it also has a higher atomic mass than zinc (Zn)

• Gallium (Ga), because it has chemical properties similar to those of aluminum (Al), and germanium (Ge), because it has chemical properties similar to those of silicon (Si)

Which element is placed in Group 12 of the periodic table due to its chemical properties being similar to zinc (Zn)?

• Cadmium (Cd)

• Antimony (Sb)

• Gallium (Ga)

• Indium (In)

Which of the following describes the properties of noble gases?

• They have high boiling points.

• They are highly reactive.

• They are generally unreactive.

• They are solid at room temperature.

What is the number of valence electrons in Group 2 elements?

• 0

• 1

• 2

• 3

From which of the following atoms would it be the most difficult to remove an electron?

• Sodium

• Aluminum

• Sulfur

• Chlorine