Answer:
Formation. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.
The SI unit for volume is cubic meters of M^3
The answer is C. Strong nuclear force. Subatomic particles in the core of an atom (protons and neutrons) are held together by this type of force. The force is known to be one of the 4 fundamental forces of our universe.
Answer:
phosphorous
Explanation:
A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements. Although elements such as gold, silver, tin, copper, lead and mercury have been known since antiquity, the first scientific discovery of an element occurred in 1649 when Hennig Brand discovered phosphorous.
Equation of reaction:
2 Na + Cl₂ → 2 NaCl
Oxidation States:
L.H.S R.H.S
O.N of Na = 0 +1 = O.N of Na in NaCl
O.N of Cl = 0 -1 = O.N of Cl in NaCl
Oxidation Reaction:
In this reaction O.S of Na is changing from 0 to +1 state, means it has oxidized with a loss of 1 electron,
Na → Na⁺ + e⁻
Reduction Reaction:
In this reaction O.S of Cl is changing from 0 to -1 state, means it has reduced with a gain of 1 electron per atom,
Cl₂ + 2e⁻ → 2Cl⁻
Oxidizing Agent:
In this reaction Cl is oxidizing agent as it has gain electron from sodium and has oxidized Na to Na⁺.
Reducing Agent:
In this reaction Na is reducing agent as it has given electron to chlorine and has reduced Cl to Cl⁻.
