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Subatomic Particles
Atomic Models
Elements
Periodic Table
Isotopes
100

Subatomic particle with a negative charge

electron

100

Came up with the solid sphere model of the atom and was the first chemist to prove the existence of the atom after Democritus first came up with the theory over 2000 years prior.

John Dalton (1804)

100
The number of protons identifies the element and it is called the element's  ________.

atomic number

100

The rows going left to right across the periodic table are called

periods

100

Isotopes are elements with differing amounts of

neutrons

200

The only subatomic particle found outside the nucleus

electron

200

Came up with the 'plumb pudding' model using a cathode ray to improve upon Dalton's model and proved the existence of electrons

JJ Thomson (1904)

200

Element with atomic number 13

Aluminum

200

The columns going up and down the periodic table are called 

groups/families

200

The number of neutrons an element with 13 protons and a mass number of 27 has

14 neutrons

300

The two subatomic particles with a mass of 1 amu

Protons, neutrons
300

Conducted the gold foil experiment to improve Thomson's model of an atom by discovering the positively charged protons and the mass of an atom is in the nucleus.

Ernest Rutherford (1911)

300

The number of protons plus the number of neutrons in an element

mass number

300

The group and period Silicon (Si) is in

Group 14, Period 3

300

Write the isotope notation for Sulfur (S) with a mass number of 33

3316S

400

The majority of an atom's mass is located here.

Nucleus

400

Improved Rutherford's atomic model by proving that electrons move around the nucleus in fixed energy levels.

Niels Bohr (1913)

400

Element with 38 electrons

Strontium (Sr) (atomic number 38 = 38 protons = 38 electrons)

400

The elements in the final group on the right side of the periodic table, Group 18, are called

The Noble Gases

400

Different isotopes of the same element will always have the same number of

protons/electrons

500

A neutral atom with 23 protons would have this many electrons. Why?

23 electrons. To maintain a neutral charge (+ = -)

500

DOUBLE JEOPARDY! 1000pts

1.) How did the Electron Cloud Model (1926) improve upon Bohr's model of an atom?
2.) Who discovered the neutron?

1.) Electrons move so fast and random that they do not move in fixed orbits but rather in a "most-likely" probability cloud.

2.) James Chadwick (1932)

500

Draw the electron configuration for a Sulfur atom

1st energy level 2
2nd energy level 8
3rd energy level 6

500

Explain why the elements of the same group/family have similar properties.

Each group/family have the same number of electrons in their outermost energy level, they have the same number of valence electrons.

500

Calculate the average atomic mass (must show correct work and proper units):
Silicon-28 (abundance: 92.21%, mass: 27.977 amu)
Silicon-29 (abundance: 4.70%, mass: 28.976 amu)
Silicon-30 (abundance: 3.09%, mass: 29.974 amu)

28.11amu

Si-28: 0.9221 x 27.977amu = 25.82amu
Si-29: 0.0470 x 28.976amu = 1.36amu
Si-30: 0.0309 x 29.974amu = 0.93amu
25.82amu + 1.36amu + 0.93amu = 28.11