Core 1 - Atoms Flashcards
1
Q
Element
A
A substance made of only one sort of atom
2
Q
What is in the nucleus of an atom
A
Protons +1
Neutrons 0
And around which are electrons -1
3
Q
In an atom the number of electrons are equal to what?
A
The number of protons
4
Q
Atomic number
A
The number of protons in an atom of an element
5
Q
Mass number
A
The sun of the protons and neutrons in an atom is its mass number
