Einsteinium is a metal, member of the actinoids family (period 7).
Boron is a metalloid placed in the group 13, period 2 of the Periodic Table of Mendeleev.
Einsteinium is a synthetic radioactive metal element. It is a member of the actinide series in the periodic table and is produced by bombarding plutonium with neutrons. It is primarily used for research purposes due to its radioactivity and short half-life.
Crystalline boron is a non-metallic element that exists in a few different forms, including a hard black powder and a dark, lustrous solid. It has a complex structure made up of interlocking B12 icosahedra which gives it its unique properties.
Boron can be found in a regular magnet (like in [or on] your refrigerator).
It is a rock of some sort
Sodium (Na) ---------------------------------------------------------------------------------------- An easier way to get that kind of answer, would just be to google it instead... (just for you to know)
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Im preaty sure they do!
Boron has a rombohedral crystalline structure.
Rutherfordium is an artificial chemical element, radioactive, unstable, metal, member of the transactinoids family, it is in the group 4 and period 7 of the periodic table of Mendeleev, etc.
Einsteinium is used only in nuclear physics laboratories: for the preparation of mendelevium (and possible other super-heavy elements), calibration of an alpha spectrometer mounted on a lunar probe, etc. Possible intentions to use Es in medicine for irradiations.
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A substance that only contains one kind of atom is called an element.