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100
Positively charged particle in the nucleus
Proton
100
Neutral charged particle in the nucleus.
neutron
100
Negatively charged particle around the nucleus.
Electron
100
Each vertical column of elements.
Group or Family
200
The atomic number of an atom equals to ......
The number of proton(s).
200
How can you calculate the mass number of atom?
p+n
200
Each horizontal row of elements on the periodic table.
Period
200
Electrons in the outermost energy level of an atom.
Valence electrons
300
A bond that forms when electrons are shared.
Covalent bond
300
A bond that forms when electrons are transferred
Ionic bond
300
Where are nonmetals found in the periodic table?
right to the periodic table.
300
Where are metals found in the periodic table?
Left to the periodic table.
400
Elements that are color of silver, higher densities than alkali metals.
Alkaline-earth metals.
400
An interaction that holds two atoms together.
Chemical bond
400
Who arranged the elements first?
Dmitri Mendeleev
400
A repeating three dimensional pattern.
Crystal lattice
500
Charged particles that form when atoms gain or lose electrons.
Ions
500
How many electrons could atoms have in a full set of electrons
2 or 8
500
Elements that are colorless, odorless gases at room temperature.
Noble gases
500
Elements that are poor conductors of electric current, violent reactions with alkali metals to form salt.
Halogens