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History
Structure
Groups
Periodic table
Grab Bag
100

Who first named the atom?

Democritus

100

Subatomic particle that has a positive charge

Proton

100

This group will never combine with any other element naturally.

Noble gases

100

The period number tells you…

Number of energy levels

100

The number of protons and neutrons is represented by the…

Mass number

200

First person to work on the periodic table

Mendeleev

200

The charge of a neutron

0 or neutral

200

The most reactive metals.

Alkali metals

200

The semi-conductors on the periodic table are classified as…

Metalloids

200

Isotopes are atoms of the same element with different numbers of            

Neutrons

300

Came up with the model that says electrons travel in fixed orbits around the nucleus

Bohr

300

Subatomic particle with a negative charge

Electrons

300

The most reactive nonmetals.

Halogens

300

Which number can be used to determine the identity of an element?

Atomic Number

300

What noble gas does not have 8 valence electrons?

Helium

400

What experiment did Rutherford use to develop his Nuclear Model?

Gold foil experiment

400

How many electrons can be held in the first energy level?

2

400

All elements in this group have 2 valence electrons.

Alkaline earth metals

400

Hydrogen’s most common isotope has  ______ proton(s) and  ______  neutron(s).

1 proton and 

0 neutrons

400

Draw a Bohr Model for the most common isotope of Sulfur.

See picture!

500

Explain JJ Thomson’s Plum Pudding Model.

The atom is positively charged with negative particles embedded throughout

 (like raisins in a pudding)

500

The mass of an atom is in the________________ where the ___________ are. 

The volume of the atom is in the _____________ where the __________ are.

The mass of an atom is in the  nucleus where the p+ and n0 are. 

The volume of the atom is in the     electron cloud where the e- are.

500

This element is the only one in its group that belongs with the group # (due to having the same # of valence e-) but not with the group name (because it is a different classification)

Hydrogen

500

This element has 4 energy levels and is one of the rare earth metals.

Scandium

500

Write the two types of isotope notation for the most common form of Sodium in nature.

Sodium-23


23Na