Question

What year were the following discovered -
1. Hydrogen
2. Helium
3. Lithium
4. Beryllium
5. Boron
6. Carbon
7. Nitrogen
8. Oxygen
9. Fluorine
10. Neon
​

Answer 1

HERE IS YOUR ANSWER MATE.....;

$1.)1766$

$2.)1868$

$3.)1817$

$4.)1798$

$5.)1808$

$6.)1789$

$7.)1722$

$8.)1722$

$9.)1886$

$10.)1898$

HOPE ITS HELPFUL.....:-)

Answer 2

1.hydrogen

Hydrogen was discovered by the English physicist Henry Cavendish in 1766.

2. Helium

The first evidence of helium was observed on August 18, 1868, as a bright yellow line with a wavelength of 587.49 nanometers in the spectrum of the chromosphere of the Sun. The line was detected by French astronomer Jules Janssen during a total solar eclipse in Guntur, India.

3. Lithium

Lithium is rare in the Universe, although it was one of the three elements, along with hydrogen and helium, to be created in the Big Bang. The element was discovered on Earth in 1817 by Johan August Arfvedson (1792-1841) in Stockholm

4.Beryllium

Beryllium was discovered in 1798 by the French chemist Louis Nicolas Vauquelin, who found it in the oxide form in beryl and a green-colored variety of beryl, emerald.

5. Boron

Borax's name comes from the Arabic buraq, meaning “white.” Boron was first partially isolated in 1808 by French chemists Joseph L.

6. Carbon

Antoine Lavoisier (1789)

7. Nitrogen

Nitrogen is the chemical element with the symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

8. Oxygen

Joseph Priestley (1733-1804) — Unitarian minister, teacher, author, and natural philosopher — was the Earl of Shelburne's librarian and tutor to his sons. In this room, then a working laboratory, Priestley pursued his investigations of gases. On 1 August 1774 he discovered oxygen.

9. Fluorine

That is exactly what happened in Gore's experiment when the fluorine gas that formed on one electrode combined with the hydrogen gas that formed on the other electrode. Ferdinand Frederic Henri Moissan, a French chemist, was the first to successfully isolate fluorine in 1886.

10. Neon

​Neon was discovered in 1898 by William Ramsay and Morris Travers at University College London. This was not the first time Ramsay had discovered a new element. In 1894, he and Lord Rayleigh had discovered argon. Then, in 1895, Ramsay obtained the world's first sample of helium.