Pre-Test
This is the smallest part of an element.
What is an atom?
What charge does a neutron have?
What is neutral?
Three subatomic particles.
What are protons, neutrons, and electrons?
The sum of protons and neutrons in the nucleus of an atom.
What is mass number?
Atoms make up everything....
What is in the universe that is physical?
Neutrons are located outside of the nucleus. True or False?
False!
What charge does a electron have?
What is negative?
Located outside of the nucleus and has a negative charge.
What are electrons?
The number of protons in an atom of a certain element.
What is atomic number?
What is the smallest piece of matter that still has all the properties of the pure substance
What is an atom?
Electrons are located outside of the nucleus. True or False?
True!
What is the charge of a proton?
What is positive?
Located inside of the nucleus and has a positive charge.
What are protons?
The atomic number of Oxygen.
What is 8?
Where are electrons located in?
What is the electron cloud?
Protons and neutrons are about the same size. True or False?
True!
What is the charge in the electron cloud?
What is negative?
Atoms of different elements have different numbers of these.
What are protons?
The mass number of Potassium.
What is 39?
Go to Picture
What is E/D in the picture?
The proton and the neutron
This is the smallest subatomic particle.
What is an electron?
An atom that is neither positively or negatively charged.
What is neutral?
All matter in the universe is composed of...
What is individual elements and combined elements?
Mass number - atomic number = ________ ________.
What is the number of neutrons?
Go to Picture
What is C?