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It is to build and maintain strong bones
Calcium
The total number of protons and neutrons in the nucleus.
Mass number
The number of protons in the nucleus.
Atomic number
The elements in the same column, have the same number of valence electrons.
Group
Elements in the same row that have the same number of electron shells.
Period
Au is a symbol of this element.
Gold
The atomic number of this element is 26.
Iron
An element is the name of a planet in the solar system.
Mercury
Most common element in the air.
Nitrogen
A basic element of life, present in graphite and diamond.
Carbon
The majority of elements are ____, these types of elements are good conductors.
Metals
Element known as good conductor of electricity, Symbol is Cu.
Copper
Helium, Neon belong to this group of elements.
Noble gases
A radioactive element is used in nuclear power plants. It has 92 protons
Uranium
The lightest element which has only one proton.
Hydrogen
The name of group 17.
Halogen
It is the basic unit of matter.
Atom
A particle in the atom that have no charge.
Neutron
Positively charged particle in the atom.
Proton
Negatively charged particle in the atom.
Electron
A single type of atoms have the same protons number in the nucleus
Element