Periodic Table

Positively charged particle in an atom's nucleus

• proton

• electron

• neutron

subatomic particle

• electron

• neutron

• proton

• all of them

atoms with the same number of protons and different number of neutrons are called

• actinides

• isotopes

• chemical symbol

• halogens

neutrons has a charge of

• -1

• +1

• zero

• 0.50

whos model is the shown model

• Cloud model

• Rutherford's model

• Bohr's model

• Thomson's model

an element that plays an especially important role in the chemistry of life

• hydrogen

• nitrogen

• carbon

• helium

the simplest element in the periodic table

• silver

• hydrogen

• gold

• oxygen

whos model is the shown model

• Bohr's model

• Democritus

• Dalton's atomic theory

• Cloud model

the element that makes up about 78% of earth's atmosphere

• Carbon

• Helium

• Oxygen

• Nitrogen

an element that is used to inflate balloons and make them float

• Oxygen

• Neon

• Helium

• Krypton