There are two elements in the first period, hydrogen and helium.
Hydrogen is the first and helium is the second.
H is the symbol for hydrogen. The first of the elements.
Calcium was used thousands of years ago. No one knows who first discovered it. Source: http://www.chemistryexplained.com/elements/A-C/Calcium.html
You are correct! According to our current understanding of the Big Bang theory, the first elements formed were hydrogen, deuterium (heavy hydrogen) and helium.
Helium. All elements have neutrons except hydrogen.
Hydrogen is the first element on the periodic table of elements. Hydrogen is also a gas.
hydrogen
All apart from Hydrogen.
Period 1: 2 elements Period 2: 8 elements Period 3: 8 elements Period 4: 18 elements Period 5: 18 elements Period 6: 32 elements Period 7: 25 elements
The first elements discovered and placed on the periodic table were hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, and magnesium. These elements were identified based on their unique chemical properties and atomic structures.
Hydrogen & Lithium 😄