Radioactive decay equation 4.2.3 Flashcards
1
Q
Why does a radioactive nucleus decay?
A
Radioactive nucleus decays to become a stable nucleus
2
Q
In alpha decay=
A
The nucleus loses an alpha particle, which is made out of 2 protons and 2 neutron.
3
Q
In beta decay=
A
An electron is ejected and kicked out of the nucleus at a high and fast -moving speed.
4
Q
In gamma decay=
A
The composition of the nucleus is unchanged so nothing happen it its atomic mass and atomic number.
5
Q
Alpha decay rules:
A
. The atomic number decreases by 2.
. The atomic mass decreases by 4.
6
Q
Beta decay rule:
A
. The atomic number increases by 1 but the atomic mass does not change.
