The answer is c to the question
Hey there!
[He]2s²2p⁴ is the electron configuration for O (oxygen).
He is the noble has before oxygen. It has 2 electrons.
The s orbital is filled, and there are 4 electrons in the p orbital, so 6 elements over to the right.
This makes a total of 8 electrons.
Hope this helps!
Answer:
Hydrogen gas (H₂) + Oxygen gas (O₂) → Water (H₂O)
Explanation:
Hydrogen reacts with oxygen to form water. The reactants are hydrogen and oxygen and the product is water.
The English scientist John Dalton were one of the early scientists who paved the way to science, particularly in atomic chemistry. His atomic theory jumpstarted further developments made by J.J Thomson, Rutherford, Bohr, Schrodinger and many more.
Dalton's atomic theory can be summarized in 5 key points:
1. Atoms are tiny, indivisible and indestructible particles of an element.
2. Atoms of different elements vary in size and mass.
3. Atoms of an element are uniform in size and mass.
4. Compounds are formulated by a fixed ratio of individual atoms of elements.
5. Reactions undergo by rearranging the atoms of the reactants to form the products.
From the choices, the acceptable answer would be: <span>The ratio of atoms in a compound is fixed. </span>
Answer:
Explanation:
People who use marble to carve monuments and sculptures are always concerned because it can easily chemically weather.
Marble is a metamorphic rock derieved from limestone. The minerals that makes up limestone are calcite and dolomite. When a metamorphic transformation occurs, the rock is subjected to intense temperature and pressure. Marble is made of calcite and dolomite minerals.
Rain water dissolves carbon dioxide to form weak carbonic acid. This weak carbonic acid can easily dissolve marble thereby defacing the monument and the sculpture.