Electrons have electric charge of -1 and the number of electrons in an atom is equal to the number of protons. ... Heavier atoms tend to have more neutrons than protons, but the number of electrons in an atom is always equal to the number of protons. So an atom as a whole is electrically neutral.
Answer:
Resonance structures are represented in the picture below.
Explanation:
When there is a double pair of electrons shared between atoms in a molecule, the position of these electrons can be changed, without changing the molecule conformation. This occurs to stabilization, the electrons are relocated. These structures are called resonance structures.
In the molecule of NO₂F, nitrogen has 5 electrons in its valence shell, so it needs 3 electrons to be stable. Oxygen has 6 electrons and needs 2 to be stable, and fluor has 7 electrons and needs one electron to be stable.
Nitrogen still has electrons after the sharing, so it can also share one pair and will have a partial positive charge. One of the oxygens will not complete the octet, so will share only one pair f electron and will have a partial negative charge, that will compensate the positive charge in nitrogen.
The two resonance structures are shown below:
A, B & C would all be correct.
Answer:
3.0x10¹⁹ atoms
Explanation:
First we <u>convert 10 mg of mercury into grams</u>:
Then we <u>convert 0.01 g of mercury into moles</u>, using its <em>molar mass</em>:
- 0.01 g ÷ 200.59 g/mol = 4.99x10⁻⁵ mol
Then we <u>convert moles into number of atoms</u>, using <em>Avogadro's number</em>:
- 4.99x10⁻⁵ mol * 6.023x10²³ atoms/mol = 3.0x10¹⁹ atoms