ions, atoms and istotopes Flashcards
1
Q
what is an ion
A
An ion is an atom or group of atoms that has an electric charge
2
Q
how many atoms are there in the human body
A
It has been estimated that a person has about 7 billion, billion, billion atoms in their body. That huge number is written as 7 followed by 27 zeros
3
Q
what are isotopes
A
isotopes are Atoms of the same element with different numbers of neutrons
4
Q
why can the nucleus in the atom sometimes be unstable
A
the nucleus in the atom can sometimes be unstable if the is extra neutrons making it radioactive
