Chemical element with symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.
What is silver?
100
This element has 5 protons, electrons, and neutrons.
Boron
100
This element has the atomic mas of 197.
What is gold?
100
This elements symbol O give the atomic number.
8
100
Period 2 group 1
Lithium
200
A chemical element with symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal.
What is sodium?
200
This element has 8 protons, electrons and neutrons.
Oxygen
200
This element has the atomic mass of 12.
What is carbon?
200
This elemnet has the symbol of Ne, give the atomic number.
10
200
Group 4 period 2
Zirconium
300
A chemical element with symbol Si and atomic number 14. A hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor.
What is calicum?
300
This element has 26 protons, neutrons and electrons?
Iron
300
This element has the atomic mass of 131.
What is krypton?
300
This element has the symbol of Sn, give the atomic number.
50
300
Period 3 group 7
Rhenium
400
A chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores.
What is osium?
400
This element has 82 protons, neutrons and electrons.
Lead
400
This element has the atomic mass of 65.
What is zinc?
400
This element has the symbol of Al, give the atomic number.
13
400
Period 4 group 17
Iodine
500
Synthetic chemical element with symbol Ds and atomic number 110. It is an extremely radioactive synthetic element. The most stable known isotope, darmstadtium-281, has a half-life of approximately 10 seconds.
What is darmstadtium?
500
This element has 86 protons, neutrons and electrons.
Radon
500
This element has the atomic mass of 89.
What is yttrium?
500
This element has the symbol of At give the atomic number.