# data[].attributes.body
Europium was founded by Eugène-Anatole Demarçay.

# data[].attributes.headline
What is special about lanthanide and actinide elements?

# data[].attributes.subject
What is special about lanthanide and actinide elements?

# data[].attributes.body
Lanthanide and actinide elements are special because they're radioactive.

# data[].attributes.headline
What do the horizontal rows in the periodic table represent?

# data[].attributes.subject
What do the horizontal rows in the periodic table represent?

# data[].attributes.body
The horizontal rows in the periodic table represent the 'periods'.

# data[].attributes.headline
What do the vertical columns in the periodic table represent?

# data[].attributes.subject
What do the vertical columns in the periodic table represent?

# data[].attributes.body
The vertical columns in the periodic table represent the 'groups' or 'families'.

# data[].attributes.body
Europium reacts with water. It reacts slowly to cold water and quite quickly with hot water, forming hydroxide and hydrogen gas. It also reacts to oxygen.

# data[].attributes.body
Although it hasn't bee full investigated, Europium salts could mildly be toxic if it has ben ingested.

# data[].attributes.body
Unfortunately, there are no important uses for europium.

# data[].attributes.headline
What's the general name given to elements in group 1?

# data[].attributes.subject
What's the general name given to elements in group 1?

# data[].attributes.body
The general name given to elements in group 1 is 'alkali metals'. This is because these elements form alkaline compounds.

# data[].attributes.body
1) Europium was named after the continent of Europe.
2) Europium has been identified in the sun and some stars.
3) Europium is about as hard as lead.
4) Europium very quickly oxidises.

# data[].attributes.headline
What's the general name given to elements in group 7?

# data[].attributes.subject
What's the general name given to elements in group 7?

# data[].attributes.body
The general name given to elements in group 7 is 'the halogens'.

# data[].attributes.headline
What's the general name given to elements in group 2?

# data[].attributes.subject
What's the general name given to elements in group 2?

# data[].attributes.body
The general name given to elements in group 2 is 'alkaline earth metals'.

# data[].attributes.headline
What's the general name given to elements in group 8?

# data[].attributes.subject
What's the general name given to elements in group 8?

# data[].attributes.body
The general name given to elements in group 8 is 'transition metals'.

# data[].attributes.body
Physical appearance: Bright, shiny surface. Its colour is steel gray.
Melting point: 826 degrees celsius.
Boiling point: 1489 degrees celsius.
Density: 5.24 grams per cubic centimetre.
Power: Europium is the most active of the lanthanides.

# data[].attributes.body
The radioactive is needed to warn people to protect themselves from being exposed to radioactivity.

# data[].attributes.headline
Find the following information for your element:

# data[].attributes.subject
Find the following information for your element:

# data[].attributes.body
Name: Europium
Symbol: Eu
Atomic number: 63
Mass number: 151.964
State it exists in at room temperature: solid
Number of protons and electrons: 63 protons and electrons