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

只有一克多的锫在1967年之后的美国被分离出来

Californium is produced in nuclear reactors and particle accelerators

锎在核反应堆和粒子加速器中被生产出来

Einsteinium is the first divalent metal in the actinide series

锿是锕系的第一个异常的金属

Sixteen isotopes of fermium are known to exist

镄有16种同位素

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

钔世第一个一次只能制造一个粒子的元素

Nobelium is a divalent ion in aqueous solution

锘在水中形成二价离子

Lawrencium is a trivalent ion in aqueous solution

铹在水中形成三价离子

Rutherfordium is the first transactinide element

卢瑟福是第一个跨元素的元素

The Berkeley team proposed the name hahnium for the element

伯克利团队为此元素提供了hahnium这个名字

There are 12 known isotopes of seaborgium

有12种已知的希希金同位素

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

唯一确认的勃艮第异构体实例是同位素²⁶²Bh

More than 100 atoms of hassium have been synthesized to date

至今已合成超过100个Hs原子

Meitnerium has 7 isotopes whose half-lives are known

Meitnerium有七种同位素，其半衰期是已知的

Darmstadtium has no stable or naturally-occurring isotopes

没有稳定存在或天然存在的同位素

Roentgenium has no stable or naturally-occurring isotopes

没有稳定存在或天然存在的同位素

Copernicium has no stable or naturally-occurring isotopes

没有稳定存在或天然存在的同位素

Nihonium is historically known as eka-thallium

Nihonium在历史上被称为eka-thallium

The longest-lived isotope currently known is ²⁸⁹Fl

目前已知寿命最长的同位素是²⁸⁹Fl

Moscovium is historically known as eka-bismuth

镆在过去被称为“类铋”

Livermorium is historically known as eka-polonium

𫟷在历史上被称为eka-钋

Tennessine is historically known as eka-astatine

鿬在历史上被称为eka-砹

Oganesson is historically known as eka-radon

鿫在历史上被称为eka-氡

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

氢气造成了一系列安全事故，如果纯氢气和空气混合产生火焰（极其容易）导致窒息

Helium is not known to be toxic

迄今无法证明氦具有毒性

Lithium is corrosive and requires special handling to avoid skin contact

锂具有腐蚀性需要特殊防护来避免其与皮肤接触

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

铍及其盐类是有毒的，应该尽最大努力进行防护

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

硼元素，硼氧化物，含硼酸，硼氧酸和很多有机硼化合物都是无毒的

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

纯碳几乎对人类无毒且木炭和石墨可以被人类安全地使用

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

封闭空间中急速释放氮气会让其取代氧气从而造成窒息事故

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

纯氧在高气压和低气压都有毒性，会导致抽搐和其他健康问题

Fluorine is highly toxic and corrosive

氟具有很强的毒性和腐蚀性

Neon is not known to be toxic

无法证明氖具有毒性

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

金属钠应该被特别关心，因为在空气中其不能保持太长时间

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

因为镁燃烧的巨大隐患，用镁的时候必须多加注意

Aluminium is not known to be toxic

迄今无法证明纯铝有毒

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

吸入细小的硅尘会导致慢性的呼吸问题

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

白磷有很大的毒性，但是红磷被认为是无毒的

Elemental sulfur is considered to be of low toxicity

单质硫被认为是低毒的

Elemental chlorine at high concentrations is extremely dangerous and poisonous

单质氯在高浓度情况下是及其危险和有毒的

Argon is considered to be non-toxic

氩被认为是无毒的

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

使用钾时必须保护好皮肤和眼睛

Calcium is considered to be non-toxic

钙元素被认为是无毒的

Scandium is considered to be of low toxicity

钪被认为是低毒的

Titanium metal is considered to be non-toxic

金属钛被认为是无毒的

All vanadium compounds should be considered toxic

所有的钒化合物都可以认为是有毒的

In larger amounts, chromium can be toxic and carcinogenic

大量的铬元素会有毒性和致癌性

Excess manganese, particularly inhalation of the powder, is toxic

过量的锰，尤其是通过呼吸吸入的粉末是有毒的

Iron is considered to be non-toxic

铁被认为是无毒的

Cobalt and its compounds are considered to be slightly toxic

钴和其化合物被认为是低毒的

Nickel and its compounds are considered to be carcinogenic

镍及其化合物被认为是致癌的