Answer:
Two Covalent Bonds
Chemistry Concepts:
Oxygen, which is in group 6 or 16 of the periodic table, has 6 valence electrons. To achieve a full outer shell of 8 electrons, oxygen needs to gain 2 electrons or share two electrons by forming covalent bonds. Therefore, oxygen typically forms two covalent bonds with other atoms to complete its outer shell and achieve a stable electron configuration.
When oxygen forms a covalent bond with another atom, it shares one or more pairs of electrons with that atom. The shared electrons are called bonding electrons, and they are shared between the oxygen atom and the other atom. The valence electrons of the other atom also participate in the covalent bond and are shared between the two atoms.
The electrons that are not involved in bonding, known as non-bonding or lone pair electrons, remain on the oxygen atom. These electrons are still part of the valence shell of the oxygen atom and are involved in its chemical properties, but they do not participate in the covalent bond with the other atom.
Furthermore, when oxygen forms a covalent bond with another atom, both atoms share electrons, including valence electrons, to achieve a more stable electron configuration.
Learn more about Covalent Bonds:
Oxygen is in group 6 of the periodic table. In general, oxygen tends to form two covalent bonds with other atoms.
To understand why oxygen forms two covalent bonds, let's look at its electron configuration. Oxygen has 8 electrons, with 2 in its innermost shell and 6 in its outermost shell. The outermost shell can hold a maximum of 8 electrons, so oxygen needs to gain 2 more electrons to have a full outer shell.
In a covalent bond, atoms share electrons to achieve a stable electron configuration. Oxygen can share two electrons with other atoms to complete its outer shell. This means that oxygen typically forms two covalent bonds, with each bond involving the sharing of two electrons.
For example, in a molecule of water (H2O), oxygen forms two covalent bonds with two hydrogen atoms. Each bond involves the sharing of one electron from each hydrogen atom and one electron from oxygen. This sharing of electrons allows all atoms involved to have a full outer shell, making the molecule stable.
It's important to note that there can be exceptions to this general rule. In some cases, oxygen can form more than two covalent bonds, such as in molecules like ozone (O3) or sulfur dioxide (SO2). However, these cases involve different bonding arrangements and are not as common as the formation of two covalent bonds.
A) Mr. Greenjeans needs a control group for comparison.
B) Mr. Greenjeans should use corn and radish seeds as a comparison.
C) Mr. Greenjeans should use three different types of pumpkin seeds.
D) Mr. Greenjeans probably should monitor the pumpkins for a longer period of time.
Mr. Greenjeans needs a control group for comparison.
How do we know that the fertilizer had any impact on growth since Mr. Greenjeans has no control group for comparison? He must know how the pumpkins will grow without any fertilizer as well. The control group gives us a way to compare the experimental groups to help form more valid conclusions.
Answer:To speed up the rate of hydrogen production
Explanation:
In the preparation of Hydrogen from the action of dilute acid on zinc metal, few drops of Copper(II)tetraoxosulphate(VI) solution is added to speed up the rate of production.
The hydrogen produced is shown in the equation below
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
Thus, Copper(II)tetraoxosulphate(VI) solution, a catalyst is used to speed up hydrogen production.
b. Atomic mass
c. atomic number
d. group or period
Answer:
atomic number
Explanation:
the atomic number is the same as the number of protons, you can identify it in the periodic table.
Answer:
m Br = 439.472 g
Explanation:
mass Br = ?
∴ mol Br = 5.50 mol
∴ molar mass Br 79.904 g/mol
mass = (mol)*(g/mol)
⇒ m Br = (5.50 mol)*(79.904 g/mol)
⇒ m Br = 439.472 g