Just over one gram of berkelium has been produced in the United States since 1967

Just over one gram of berkelium has been produced in the United States since 1967

Californium is produced in nuclear reactors and particle accelerators

Californium is produced in nuclear reactors and particle accelerators

Einsteinium is the first divalent metal in the actinide series

Einsteinium is the first divalent metal in the actinide series

Sixteen isotopes of fermium are known to exist

Sixteen isotopes of fermium are known to exist

Mendelevium was the first element to be produced one atom at a time

Mendelevium was the first element to be produced one atom at a time

Nobelium is a divalent ion in aqueous solution

Nobelium is a divalent ion in aqueous solution

Lawrencium is a trivalent ion in aqueous solution

Lawrencium is a trivalent ion in aqueous solution

Rutherfordium is the first transactinide element

Rutherfordium is the first transactinide element

The Berkeley team proposed the name hahnium for the element

The Berkeley team proposed the name hahnium for the element

There are 12 known isotopes of seaborgium

There are 12 known isotopes of seaborgium

The only confirmed example of isomerism in bohrium is in the isotope ²⁶²Bh

The only confirmed example of isomerism in bohrium is in the isotope ²⁶²Bh

More than 100 atoms of hassium have been synthesized to date

More than 100 atoms of hassium have been synthesized to date

Meitnerium has 7 isotopes whose half-lives are known

Meitnerium has 7 isotopes whose half-lives are known

Darmstadtium has no stable or naturally-occurring isotopes

Darmstadtium has no stable or naturally-occurring isotopes

Roentgenium has no stable or naturally-occurring isotopes

Roentgenium has no stable or naturally-occurring isotopes

Copernicium has no stable or naturally-occurring isotopes

Copernicium has no stable or naturally-occurring isotopes

Nihonium is historically known as eka-thallium

Nihonium is historically known as eka-thallium

The longest-lived isotope currently known is ²⁸⁹Fl

The longest-lived isotope currently known is ²⁸⁹Fl

Moscovium is historically known as eka-bismuth

Moscovium is historically known as eka-bismuth

Livermorium is historically known as eka-polonium

Livermorium is historically known as eka-polonium

Tennessine is historically known as eka-astatine

Tennessine is historically known as eka-astatine

Oganesson is historically known as eka-radon

Oganesson is historically known as eka-radon

Hydrogen poses a number of hazards to safety, from fires when mixed with air to being an asphyxiant in its pure form

Hydrogen poses a number of hazards to safety, from fires when mixed with air to being an asphyxiant in its pure form

Helium is not known to be toxic

Helium is not known to be toxic

Lithium is corrosive and requires special handling to avoid skin contact

Lithium is corrosive and requires special handling to avoid skin contact

Beryllium and its salts are toxic and should be handled with the greatest of care

Beryllium and its salts are toxic and should be handled with the greatest of care

Elemental boron, boron oxide, boric acid, borates and many organoboron compounds are non-toxic

Elemental boron, boron oxide, boric acid, borates and many organoboron compounds are non-toxic

Pure carbon has extremely low toxicity to humans and can be handled safely in the form of graphite or charcoal

Pure carbon has extremely low toxicity to humans and can be handled safely in the form of graphite or charcoal

Rapid release of nitrogen gas into an enclosed space can displace oxygen, and therefore represents an asphyxiation hazard

Rapid release of nitrogen gas into an enclosed space can displace oxygen, and therefore represents an asphyxiation hazard

Oxygen gas can be toxic at elevated partial pressures, leading to convulsions and other health problems

Oxygen gas can be toxic at elevated partial pressures, leading to convulsions and other health problems

Fluorine is highly toxic and corrosive

Fluorine is highly toxic and corrosive

Neon is not known to be toxic

Neon is not known to be toxic

Sodium metal should be handled with great care as it cannot be maintained in an inert atmosphere

Sodium metal should be handled with great care as it cannot be maintained in an inert atmosphere

Because serious fires can occur, great care should be taken in handling magnesium metal

Because serious fires can occur, great care should be taken in handling magnesium metal

Aluminium is not known to be toxic

Aluminium is not known to be toxic

If breathed in as a fine silica/silicate dust, it may cause chronic respiratory problems

If breathed in as a fine silica/silicate dust, it may cause chronic respiratory problems

White phosphorus is highly toxic while red phosphorus is considered non-toxic

White phosphorus is highly toxic while red phosphorus is considered non-toxic

Elemental sulfur is considered to be of low toxicity

Elemental sulfur is considered to be of low toxicity

Elemental chlorine at high concentrations is extremely dangerous and poisonous

Elemental chlorine at high concentrations is extremely dangerous and poisonous

Argon is considered to be non-toxic

Argon is considered to be non-toxic

Potassium must be handled with great care with full skin and eye protection

Potassium must be handled with great care with full skin and eye protection

Calcium is considered to be non-toxic

Calcium is considered to be non-toxic

Scandium is considered to be of low toxicity

Scandium is considered to be of low toxicity

Titanium metal is considered to be non-toxic

Titanium metal is considered to be non-toxic

All vanadium compounds should be considered toxic

All vanadium compounds should be considered toxic

In larger amounts, chromium can be toxic and carcinogenic

In larger amounts, chromium can be toxic and carcinogenic

Excess manganese, particularly inhalation of the powder, is toxic

Excess manganese, particularly inhalation of the powder, is toxic

Iron is considered to be non-toxic

Iron is considered to be non-toxic

Cobalt and its compounds are considered to be slightly toxic

Cobalt and its compounds are considered to be slightly toxic

Nickel and its compounds are considered to be carcinogenic

Nickel and its compounds are considered to be carcinogenic