Reactivity of Rubidium and Potassium Quiz

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Why is rubidium more reactive than potassium?

Rubidium has more protons than potassium.

Rubidium has a higher atomic number than potassium.

Rubidium has a greater tendency to lose electrons than potassium. (correct)

Rubidium forms stronger ionic bonds than potassium.

What is a common observation that shows rubidium is more reactive than potassium?

Rubidium tarnishes more quickly in air compared to potassium.

Rubidium forms fewer compounds than potassium in general.

Rubidium reacts vigorously with water, producing more heat and hydrogen gas than potassium. (correct)

Rubidium has a lower reactivity towards halogens than potassium.

Which statement is correct about the noble gases?

The noble gases have molecules with two atoms.

The noble gases have boiling points that increase going down the group. (correct)

The noble gases react with metals to form ionic compounds.

The noble gases all have atoms with eight electrons in the outer shell.

Which isotopic mass number of neon has the highest percentage abundance?

20 Signup and view all the answers

In electrolysis of molten sodium chloride to produce sodium, what is the correct half equation for the production of sodium?

Na+ + e- → Na Signup and view all the answers

What is a key difference between rubidium and potassium in their reactivity?

Potassium reacts faster with water but slower with oxygen compared to rubidium. Signup and view all the answers

What is the purpose of using a mesh to keep the products of electrolysis apart?

To prevent the products from reacting with each other Signup and view all the answers

In the electrolysis of molten sodium chloride, which type of particle passes through the mesh?

Ion Signup and view all the answers

Which two ions are present in aqueous sodium chloride solution, in addition to sodium and chloride ions?

Hydroxide ions and hydrogen ions Signup and view all the answers

What is the alkaline solution produced during the electrolysis of aqueous sodium chloride?

Sodium hydroxide Signup and view all the answers

In the reaction 2C(s) + SiO2(s) → Si(s) + 2CO(g), what does this reaction indicate about the position of silicon in the reactivity series?

Silicon is less reactive than carbon Signup and view all the answers

What happens when an atom loses an electron in an electrolytic cell?

It gains a positive charge Signup and view all the answers

Which section of the periodic table in Figure 1 is most likely to contain element Q?

Group 2 Signup and view all the answers

Which section of the periodic table in Figure 1 is most likely to contain element R?

Group 3 Signup and view all the answers

What are two differences between the physical properties of Group 1 elements and transition elements?

Group 1 elements are harder than transition elements, Transition elements have lower boiling points than Group 1 elements Signup and view all the answers

What type of bonding is typically found in compounds formed between metals and non-metals?

Ionic bonding Signup and view all the answers

Describe what happens when a magnesium atom reacts with an oxygen atom, with reference to electrons.

Magnesium loses electrons to oxygen forming magnesium oxide through ionic bonding Signup and view all the answers

What happens when sodium carbonate reacts with hydrochloric acid in an exothermic reaction?

The reaction releases heat to the surroundings Signup and view all the answers