Properties of Matter Flashcards
1
Q
Compounds are
A
substances that are made of combined different types of atoms
2
Q
Homogeneous mixture
A
a mixture where components are uniformly distributed
3
Q
Heterogeneous mixture
A
a combination of two or more substances that are not mixed uniformly
4
Q
Isotopes are …
A
atoms that have the same number of protons but different number of neutrons
5
Q
Radioisotopes
A
radioactive isotopes that have broken down to become stable but emit radiation in forms of alpha particles, beta particles and gamma particles.
6
Q
Alpha particles …
A
- 2 protons and 2 neutrons
- emitted when there are two few electrons
- low level of radiation (paper) (travel only 2cm)
- high ionization
7
Q
Beta particles
A
- are electrons
- emitted when there are too many neutrons
- high energy levels (aluminum) (travel meters)
- neutron is converted to proton
8
Q
Gamma radiation…
A
- high energy electromagnetic radiation
- can only be stopped by lead or thick concrete
- low ionization
