Atoms 1.6 Flashcards
What relative charge does a proton have?
+1
What relative charge does a Neutron have?
0
What relative recharge does an Electron have?
-1
What relative mass does a Proton have?
1
What relative mass does a Neutron have?
1
What relative mass does an Electron have?
0.0005
What does the nucleus contain?
Protons and Neutrons
What charge does the nucleus of an atom have?
Why?
A positive charge
Because of the protons
What is heavier;
the nucleus or the outer shells
The nucleus contains most of the weight in an atom
The nucleus is very small, but the outer shells cover a lot of space
What makes an atom a neutral one
A neutral atom has the same number of protons and electrons- they balance each other out
What is the mass number and atomic number :
23
NA
11
Mass number: 23
Atomic number: 11
What is the mass number of an element?
The total number of protons and neutrons
What are atoms called when they join together?
Atoms can join together to form molecules
Give an example of a molecule made up of just one element
H2
Give an example of a molecule made up of more than one element
H2O
