1.3 Atomic structure Flashcards
1
Q
What is the definition of an atom?
A
The smallest piece of an element that can be recognised as that element
2
Q
What is a molecule?
A
Atoms joined together
3
Q
What does a molecule consist of
A
Two or more atoms chemically bonded
4
Q
What is the relative mass of an electron?
A
1/1836
5
Q
What is the atomic number?
A
The number of protons in an atoms nucleus
6
Q
What is the mass number?
A
The total number of protons neutrons in a nucleus
7
Q
How do you calculate the number of neutrons
A
mass number - atomic number
8
Q
What is an isotope?
A
Atoms that have the same number of protons and different numbers of neutrons
9
Q
What is the relative atomic mass?
A
The average mass of an atom
