There are 3 subatomic particles: Neutrons, protons and electrons.
Neutrons: These particles does not carry any charge and are located inside the nucleus.
Protons: These particles carry positive charge and are also located inside the nucleus.
Electrons: These particles carry negative charge and are found around the nucleus in the orbits. If an element looses 1 electron, it will carry positive charge and if an element gains 1 electron, it will carry a negative charge.
Element is identified by its atomic number. Atomic number is defined as the number of protons or number of electrons.
If one, identifies the number of protons, then the element is easily identified. Electrons on the other hand are easy to remove or add, so it is not convenient to use the number of electrons in identifying the element.
Besides building teeth and bones, calcium also keeps your blood and muscles moving and helps your nerves send messages from your brain to the rest of your body. Your body can't make calcium, so you need to get it from food or supplements. While you're pregnant, try to get at least 1,000 mg of calcium every day.
