Basic chemistry

Question	Answer
What do sub atomic particles have	A charge and mass
How do you work out the mass of a sub atomic particle?	Adding together protons and neutrons
What happens to the charges when the atom has and equal number of protons and electrons.	They cancel out
What charge to neutrons have	None, they are neutral
How do you work out the mass number of an atom	You add up the protons and neutrons
How many electrons does the first shell of an atom hold	2
How many electrons does the second shell of an atom hold	8
What is the charge of a neutron	Positive +
What is the charge of an electron	Negative -
Whats the relative mass of a proton	1
What's the relative mass of a neutron	1
What the relative mass of an electron	0.0005
How many electrons does the third shell of an atom hold	18, but only fills up with 8 before the next shell is started
What is always identical in the atom?	The number of protons and electrons
What do atoms with the same number of electrons on their outer shell have?	Similar chemical properties

Resource summary

	Created by rebeccahumphries about 9 years ago