Atoms Flashcards
1
Q
What is the nucleus and what is in it
A
The nucleus is the centre of the atom It contains protons and neutrons protons have a positive charge neutrons have no charge so the nucleus has a positive charge overall because of the protons in it
2
Q
The Electrons, what do they do??
A
The electrons move around the nucleus, they are negatively charged
they are tiny but they cover a lot of space
they occupy shells around the nucleus
3
Q
Protons, Neutrons and Electrons charges
A
Protons have a charge of +1 and neutrons are neutral
Electrons have a relative charge of -1
4
Q
What is the atomic number of an element
A
the number of protons in the nucleus of its atoms
5
Q
Number of neutrons =
A
Mass number - Atomic number
