Review Ch 2-5

Front

How many carbon atoms are in one molecule of CH₃C₄N₂(CO₂)₆(CH₃)₄?

Back

15

Front

What are elements that don't readily react called? Name one noble element.

Back

Noble elements; examples include gold, silver, xenon, krypton, helium, neon, argon, radon, platinum.

Front

What is the SI unit for expressing the mass of a block of gold (Au)?

Back

Kg

Front

Relative to a proton, does an electron have much mass?

Back

No

Front

What is the charge on a potassium ion (K)?

Back

+1

Front

What is the atomic number of gold (Au)?

Back

79

Front

Define the term 'ion'.

Back

An ion is an atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.

Front

What is the difference between a cation and an anion?

Back

A cation is a positively charged ion, while an anion is a negatively charged ion.

Front

What is the significance of the octet rule in chemistry?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons, leading to greater stability.

Front

What is the molecular formula for glucose?

Back

C₆H₁₂O₆