What element is named after Copenhagen Denmark?

What element is named after Copenhagen Denmark?

Hafnium is named after the Latin designation ‘hafniae’ for the city of Copenhagen, Denmark. Niels Bohr, from Copenhagen, predicted in 1922 that element 72 would exhibit almost identical chemical behaviour to the by-then-known element zirconium (40Zr).

Do otters have pouches?

Under each foreleg, the sea otter has a loose pouch of skin that extends across the chest. In this pouch (preferentially the left one), the animal stores collected food to bring to the surface. This pouch also holds a rock, unique to the otter, that is used to break open shellfish and clams.

How many countries does the Nile River flow through?

The Nile is an “international” river as its water resources are shared by eleven countries, namely, Tanzania, Uganda, Rwanda, Burundi, Congo-Kinshasa, Kenya, Ethiopia, Eritrea, South Sudan, Sudan and Egypt.

How much do baby blue whales weigh?

After about a year inside its mother’s womb, a baby blue whale emerges weighing up to 3 tons (2.7 metric tons) and stretching to 25 feet (8 meters). It gorges on nothing but mother’s milk and gains about 200 pounds (91 kilograms) every day for its first year.

How much water is inside the human body?

By one year of age, that amount drops to about 65%. In adult men, about 60% of their bodies are water. However, fat tissue does not have as much water as lean tissue. In adult women, fat makes up more of the body than men, so they have about 55% of their bodies made of water.

Is it dived or dove?

Dived is the traditional past tense and past participle of to dive, but dove has crept in over the last two centuries — particularly in the US. This is probably a result of the verb to drive (with its past tense drove) becoming more common.

How long does it take for brown recluse eggs to hatch?

Adult brown recluse spiders often live about one to two years. Each female produces several egg sacs over a period of two to three months, from May to July, with approximately fifty eggs in each sac. The eggs hatch in about one month. The spiderlings take about one year to grow to adulthood.

When were marshmallows invented?

During those times, Egyptians made individual marshmallows by hand by extracting sap from a mallow plant and mixing it with nuts and honey. This delicious sweet developed a new form when, in the 1800s, candy makers in France took the sap from marshmallow plants and combined it with egg whites and sugar.