Tag: science & technology

In the periodic table, C is the chemical symbol for Carbon, a nonmetal element with atomic number 6. Carbon is the basis of organic chemistry and is essential for life. The other options are incorrect: C programming language, speed of light (c in physics), and coal (which contains carbon but is not an element).

Aurum is the Latin word for gold, which is why gold's chemical symbol is Au. The other options are incorrect - gold does not have Greek or Hebrew names called Aurum, and Aurum is not related to silver.

Elements in the same period (horizontal row) have the same number of electron shells. This is a fundamental periodic trend - as you move across a period, the outermost electrons are added to the same principal energy level.

Hydrogen is the first element in the periodic table with atomic number 1. It is the lightest and most abundant element in the universe, placed at the top-left corner of the periodic table.

The periodic table was invented by Dmitri Mendeleev in 1869. He arranged elements by atomic weight and properties, leaving gaps for undiscovered elements which were later found.

Radon (Rn) is the only radioactive noble gas among the options. All noble gases are stable except radon, which has no stable isotopes and is radioactive due to its large atomic size and nuclear instability.

Oxygen (O) is NOT a noble gas - it is a highly reactive nonmetal in Group 16. The noble gases are Helium, Neon, Argon, Krypton, Xenon, and Radon in Group 18.

The symbol Fe represents Iron, which comes from the Latin word 'Ferrum'. The other options are incorrect - K is Potassium, I is Iodine, and S is Sulfur.

The water signs in astrology are Cancer, Scorpio, and Pisces. Scorpio is correctly identified as one of the three water signs. Aries and Sagittarius are fire signs, while Taurus is an earth sign.

Pisces is the 12th and final sign of the astrological calendar. The zodiac cycle begins with Aries and ends with Pisces. Sagittarius is the 9th sign, Aries is the 1st, and Cancer is the 4th.