How many particles?
The number of protons in Calcium (Ca)
What is 20
Oxygen
What is a gas
Gold
What is Au
The number of electrons in Phosphorus (P)
What is 15
Magnesium
What is a solid
Iron
What is Fe
The number of neutrons in Neon (Ne)
What is 10
Bromine
What is a liquid
Potassium
What is K
The number of electrons in Cesium (Ce).
What is 55
Nickel
What is a solid
Lead
What is Pb
The number of neutrons in Hydrogen (H)
What is 0
Xenon
What is a gas
Tungsten
What is W