Oquizy

John wants to explain why neon (Ne) is unreactive in chemical reactions. What is the most accurate reason?

It has a full outer electron shell. It has a high atomic number. It has low melting and boiling points. It has two electron shells.

The room floods with bromine water! John panics, but Xinyi stays calm. A screen appears: "Predict what happens when chlorine gas is bubbled through this bromine water."

Bromine gas is released No reaction Solution turns colourless Solution turns reddish-brown

A newly discovered element by John has properties similar to sodium. It reacts violently with water, forms a basic oxide, and has one valence electron. Which statement is most likely true about its location on the Periodic Table with respect to Sodium?

Different group and period Same group, different period Same period, different group Same period, same group

Xinyi challenges John to predict which carbonate decomposes most easily upon heating. Given: calcium carbonate, zinc carbonate, copper(II) carbonate, and silver carbonate. Which is the correct order from most stable to least stable?

Calcium carbonate > Zinc carbonate > Copper(II) carbonate > Silver carbonate Silver carbonate > Copper(II) carbonate > Zinc carbonate > Calcium carbonate Silver carbonate > Zinc carbonate > Copper(II) carbonate > Calcium carbonate Zinc carbonate > Calcium carbonate > Silver carbonate > Copper(II) carbonate

John wants to protect underwater pipelines from rusting by attaching a block of magnesium. Xinyi asks: Why does this work?

Magnesium acts as a sacrificial anode and corrodes instead of the iron. Magnesium forms a protective oxide layer over the iron surface. Magnesium increases the pH of water, preventing rust. Magnesium reacts with oxygen to produce a barrier of magnesium carbonate.

The next puzzle shows melting points of three metals from the same group: 181°C, 98°C, and 63°C. The metals are Lithium, Sodium, and Potassium. Which metal corresponds to the lowest melting point, and why?

Lithium, because it's the smallest atom Potassium, because melting point decreases down Group I Potassium, because metallic bonding gets stronger down the group Sodium, because it's in the middle

Quiz: Chemistry - Patterns In The Periodic Table