Periodic Table Short Test pt.1 2021

Use the Periodic Table to answer this question.

Which two particles have the same number of electrons?

• Ar and Ca

• Na⁺ and K⁺

• Fe²⁺ and Fe³⁺

• Ca²⁺and Sc³⁺

• 1 and 2

• 1 and 3

• 1 only

• 2 and 3

• 1 and 2

• 1 and 3

• 2 and 4

• 3 and 4

Germanium is in Group IV of the Periodic Table. It has a proton number of 32.

Selenium is in Group VI of the Periodic Table. It has a proton number of 34.

Which prediction can be made, based on the positions of germanium and selenium in the Periodic Table?

• A germanium atom has two more valence electrons than a selenium atom.

• Germanium forms a Ge³⁺ion and selenium forms an Se^3-ion.

• Germanium has more metallic character than selenium

• Germanium has similar properties to tellurium, and selenium has similar properties to tin.

• A

• B

• C

• D

Nickel is a transition element.

Which properties does it have?

1 It can act as a catalyst.

2 It conducts electricity when molten.

3 It forms coloured compounds.

4 It has only one oxidation state in its compounds.

• 1, 2 and 3

• 1, 3 and 4

• 1 and 2 only

• 1 and 3 only

• WX and YZ

• WY₂ and WZ

• WZ and XZ

• X₂Z₃ and YZ

The elements in Group I have similar chemical properties.

Which statement explains why this is true?

• They all have metallic bonding.

• They all have the same number of complete electron shells.

• They all have the same number of electrons in their outer shell.

• They are all stored under oil to prevent reactions with the air.

• A

• B

• C

• D

• W and X

• W and Y

• X and Y

• Y and Z