This element does not occur as the metal itself in nature and insted is found in various minerals including limestone, gypsum, and florite. It is a gray-silver metal that is rather hard.
HINT: milk :)
What is calcium?
100
Na
What is sodium?
100
This decreases as you go down a group for metals. This increases as you down a group for nonmetals.
What is melting point?
100
These are some of the elements in this group: Li, Na, K
What are the alkali metals?
100
1s1
What is hydrogen?
200
This element is an essential component of living systems and is found in nervous tissue and cell cytoplasm. It is insoluble in water and catches fire spontaneously in air.
HINT: atomic number is 15
What is Phosphorus?
200
B
What is boron?
200
This is simply the radius of an atom and indicates the atom's volume.
What is atomic radius?
200
These are some elements in this group: Be, Mg, Ca.
What are alkaline earth metals?
200
1s2 2s2 2p3
What is nitrogen?
300
This element is brittle, hard, and a trasitional metal with magnetic properties. It is present in meterorites.
HINT: atomic weight is 58.9.
What is Colbalt?
300
S
What is sulfur?
300
This is the atom's desire to grab another atom's electons.
What is electronegativity.
300
These are some elements in this group: He, Xe, Ar.
What are the nobel gases?
300
[Ar] 4s2
What is calcium?
400
This element is a steel-gray metal and has the highest melting point and lowest vapor pressure of all metals.
HINT: symbol= W
What is Tungsten?
400
Bi
What is Bismuth?
400
This is the amount of energy required to remove the outmost electron.
What is ionization energy?
400
These are some elements in this group: F, Cl, Br.
What are the halogens?
400
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5
What is Iodine?
500
This element is brilliant white when freshly prepared, but blackens when exposed to air. It exhibits luminescence, as do its salts.
HINT: hazardous, causes cancer.
What is Radium?
500
Ce
What is Cerium?
500
This is how likely or vigorously an atom is to react with other substances. It is usually determined by how easily electrons can be removed.