HartsellCHEM-GradedQuiz#2Review

The elements in the Periodic Table of Elements is arranged based on the increasing of

• the number of shell

• the number of proton

• the number of electron

• the nucleon number

Element G is placed in Group 14 and Period 2.

What is the proton number for atom G?

• 2

• 6

• 18

• 18

Neon and Argon are unreactive properties. Why?

• they have achieved stable octet electron arrangement

• they belongs to Group 18 in the Periodic Table

• they are held together by weak Van der Waals forces of attraction

• they are known as noble gasses

Who arranged the known elements into horizontal rows of increasing atomic mass leaving gaps for as yet undiscovered elements?

• Mendeleev

• Meyer

• Newlands

• Moseley

Mendeleev classified elements based on not only atomic mass but what else?                                                   

• reactivity
• boiling points
• physical properties only 
•  chemical & physical properties

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

Why are the elements in Group 8A (18) called Noble gases?

• They were discovered by the royal family.

• They are more valuable than other gases.

• They rarely take part in a reaction.

• They are highly reactive.

The element symbol for iron includes the number 55.845. What is this number called?

• atomic number

• atomic mass

• atomic configuration

• atomic element

True or False: Noble gases react with water

• True

• False

What is another name for the elements in group 7?

• The Halogens

• The Oxides

• The Noble Gases

• The Alkali Metals