Pre-Test
Charges
Subatomic
Numbers
History of the Atom
100
This is the smallest part of an element.
What is an atom?
100
Objects with the same charge do this when they come close to each other.
What is repel?
100

Three subatomic particles.

What are protons, neutrons, and electrons?

100
The sum of protons and neutrons in the nucleus of an atom.
What is mass number?
100

Who came up with the Plum pudding/Chocolate chip cookie model of the atom?

JJ Thompson

200
Neutrons are located outside of the nucleus. True or False?
False!
200
Objects with different charges do this when they come close to each other.
What is attract?
200
Located outside of the nucleus and have a negative charge.
What are electrons?
200
The number of protons in an atom of a certain element.
What is atomic number?
200

Who came up with the "Nuclear Model" of the atom?

Ernest Rutherford

300
Electrons are located outside of the nucleus. True or False?
True!
300

An Electron has this charge...

What is negative?

300
Located inside of the nucleus and have a positive charge.
What are protons?
300
The atomic number of Oxygen.
What is 8?
300

This scientists recognized atoms of a particular element differ from other elements...

John Dalton

400
Protons and neutrons are about the same size. True or False?
True!
400

A Proton has this charge...

What is positive?

400
Atoms of different elements have different numbers of these.
What are protons?
400
The mass number of Potassium.
What is 39.098?
400

Erwin Schrödinger came up with the ____________ model

Quantum Model

500
This is the smallest subatomic particle.
What is an electron?
500

An atom that is neither positively or negatively charged.

What is neutral?

500

The Atomic number is the same as... (name the two)

Proton and Electron

500
Mass number - atomic number = ______ __ ________.
What is the numer of neutrons?
500

This scientists proposed stable electron orbits

Niels Bohr

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