Question

some sentences about mercury

Answer 1

Answer:

Mercury is the smallest and innermost planet in the Solar System. Its orbit around the Sun takes 87.97 days, the shortest of all the planets in the Solar System. It is named after the god Hermes  translated into Latin Mercurius Mercury, god of commerce, messenger of the gods, mediator between gods and mortals.

Like Venus, Mercury orbits the Sun within Earth's orbit as an inferior planet, and its apparent distance from the Sun as viewed from Earth never exceeds 28°. This proximity to the Sun means the planet can only be seen near the western horizon after sunset or eastern horizon before sunrise, usually in twilight. At this time, it may appear as a bright star-like object, but is often far more difficult to observe than Venus. The planet telescopically displays the complete range of phases, similar to Venus and the Moon, as it moves in its inner orbit relative to Earth, which recurs over its synodic period of approximately 116 days.

Mercury rotates in a way that is unique in the Solar System. It is tidally locked with the Sun in a 3:2 spin–orbit resonance meaning that relative to the fixed stars, it rotates on its axis exactly three times for every two revolutions it makes around the Sun As seen from the Sun, in a frame of reference that rotates with the orbital motion, it appears to rotate only once every two Mercurian years. An observer on Mercury would therefore see only one day every two Mercurian years.

Mercury's axis has the smallest tilt of any of the Solar System's planets (about ​1⁄30 degree). Its orbital eccentricity is the largest of all known planets in the Solar System; at perihelion, Mercury's distance from the Sun is only about two-thirds (or 66%) of its distance at aphelion. Mercury's surface appears heavily cratered and is similar in appearance to the Moon's, indicating that it has been geologically inactive for billions of years. Having almost no atmosphere to retain heat, it has surface temperatures that vary diurnally more than on any other planet in the Solar System, ranging from 100 K (−173 °C; −280 °F) at night to 700 K (427 °C; 800 °F) during the day across the equatorial regions.[18] The polar regions are constantly below 180 K (−93 °C; −136 °F). The planet has no known natural satellites.

Two spacecraft have visited Mercury: Mariner 10 flew by in 1974 and 1975; and MESSENGER, launched in 2004, orbited Mercury over 4,000 times in four years before exhausting its fuel and crashing into the planet's surface on April 30, 2015 The BepiColombo spacecraft is planned to arrive at Mercury in 2025.

Answer 2

Explanation:

• Mercury is the only metal that is a liquid at standard temperature and pressure.
• The modern element symbol for mercury is Hg(hydrargyrum).
• Mercury is a very rare element in the Earth's crust.
• it combines so readily with aluminum and forms amalgam.
• Mercury does not react with most acids.
• Mercury is a relatively poor conductor of heat.
• qThe freezing point (-38.8 C) and boiling point (356 C) of mercury are closer together than all other metals..
• Like noble gases, mercury forms relatively weak chemical bonds with other elements.
• It forms amalgams with all the other metals except iron. This makes iron a good choice to build containers for holding and transporting mercury.
• Mercury is used in fluorescent lamps, thermometers, float valves, dental amalgams, in medicine, for the production of other chemicals, and to make liquid mirrors. Mercury(II) fulminate is an explosive used as a primer in firearms.