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100

What was J.W. Doberiner known for?

He was the first chemist to classify elements by similar properties. 

100

As a group goes down, does Zeff increase or decrease?

What is decreases

100

1s1

H

100

What group is sodium in and is it a metal, nonmetal, metalloid?

Sodium is an alkali metal. 

100

What is the name of something that is 1/2 the distance between 2 nuclei?

Atomic Radius. 

200

Who is Glen T. Seaborg and what is he known for?

He was an American chemist who discovered several f-series elements and determined the position of the f-series elements. 

200

Does metal reactivity increase going down a group or across a period. 

Going down a group. 

200

[Ne] 3s1

Na

200

What group is fluorine in and is it a metal, nonmetal, metalloid?

Fluorine is a nonmetal in the halogen family. 
200

How do non metals react?

They react by gaining an electron. 

300

What is the name of the chemist who is known as the father of the periodic table? 

Dimitri Mendeleev

300
As atomic radius increases what happens to the ionization energy. 

It decreases.

300

Fe

[Ar] 4s2 3d6

 

300

What family is magnesium in and is it a metal nonmetal or metalloid.

Magnesium is a metal in the alkali earth metal family.

300

Define oxidation number. 

The charge an atom acquires to obtain a full shell.  

400

Henry Mosley is a British Chemist known for discovering that the number of elements protons determines what element it is. What else did he do.

He organized the elements in the table according to their atomic number. 

400

As Zeff increases what happens to ionization energy and metal reactivity. 

Ionization energy decreases and metal reactivity increases. 

400

Ar

[Ne] 3s2 3p6

400

What family is argon in and is it a metal nonmetal or metalloid.

Argon belongs to the noble gas family and is classified as a nonmetal.  

400

Which of the following has a higher electronegativity? Na or Mg

Mg

500

Define periodic law?

When elements are placed in order of increasing atomic number there is a periodic repetition of their physical and chemical state.

500

Which has greater Zeff Chlorine or Bromine?

Chlorine 

500

 [Xe] 4f14 5d10 6s2 6p4

Po

500

What family is Mercury in and is it a metal, non-metal, or metalloid?

Mercury is a metal in the transition metal family.

500

What elemental halogen is greenish yellow color.

Cl