Pre-Test
Charges
Subatomic
Numbers
Atomic Model
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
JJ. Thompsons model is called ___________. 

What is a plum pudding model?

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

The planetary model of atom is presented by ___________________________. 

What Ernest Rutherford?

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

The charge of electrons. 

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

The experiment conducted by Rutherford. 

What is Gold Foil experiment?

400
Protons and neutrons are about the same size. True or False?
True!
400
The charge of a proton.


What is positive?

400
Atoms of different elements have different numbers of these.
What are protons?
400

The mass number of Oxygen. It has 8 protons, 8 neutrons and 8 electrons. 

What is 16?

400

The region of space around the nucleus where an electron is likely to be found.

What is an orbital?

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

An atom has the same number of protons and electrons always. True or false.

What false, atoms with different no. of electrons and protons are called isotopes. 

500

Mass number - atomic number = ______ __ ________.

What is the number of neutrons?

500

According to the planetary model of atom, the volume of an atom is taken up by mostly _________________. 

What is empty space?

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