Answer:
In materials of molecular structure, the nature of intermolecular and intramolecular bonds has a decisive influence on their characteristics and properties. Characteristics such as melting and boiling points, mechanical strength and hardness depend on the type of such bonds.
No because they have their complete octet. They are completely filled and don't need to bond with any other atoms. The full atoms that are happy are the noble gases.
Noble gases have electron shells with full valence. Valence electrons are the atom's outermost electrons and are typically the only electrons involved in chemical bonding.
Noble gases are elements that have completely filled their valence shells, completing their octets. Helium, Neon, Argon, Krypton, Xenon, and Radon are examples of noble gases.
Thus, the elements like He, and Xenon can not form bond with other atoms because they have completely filled orbital so, they are not loosing or gaining any electron from other atoms, that's why they are called “happy, full” elements.
To learn more about the noble gases, follow the link;
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The hybrid atomic orbitals are formed by the combination of the valence orbitals on an atom. The hybrid orbitals formed have different energy and shape compared to the atomic orbitals that combine to form the hybrid orbitals. Hybrid orbitals help in explaining the shapes of the molecules and other bonding properties.
Therefore the correct answer will be,
b. A mixture of the valence orbitals in an atom
e. There are as many hybrid orbitals as there are valence orbitals that mix together.
f. Hybrid orbitals have a different shape and different energy than the atomic orbitals of which they are made
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Answer: 1.5
Explanation:
The acid, HCIO4 ionizes to give hydrogen ion (H+) and a conjugate base as follows:
HCIO4(aq) <---> H+(aq) + CIO4-(aq)
Hence, the H+ has also have a concentration of 0.0282 M
Mathematically, pH is expressed as:
pH = -log(H+), where H+ is the concentration of hydrogen ion.
So, for HCIO4
pH = - log (0.0282 M)
pH = - (-1.5497) (The two minus signs will cancel out)
pH = 1.5497
Round the pH value to the nearest tenth as 1.5
Thus, the pH of 0.0282 M of HCIO4 is 1.5, also HCIO4 is strongly acidic since pH values less than 7 are regarded as acidic.
Answer:
mass Mg = 1.937 Kg
Explanation:
from periodic table for Mg:
⇒ molecular mass Mg = 24.305 g/mol
∴ mol ≡ 6.022 E23 atoms
⇒ mol Mg = (4.80 E25 atoms)×(mol/6.022 E23 atoms)
⇒ mol Mg = 79.708 mol
⇒ mass Mg = (79.708 mol)×(24.305 g/mol)
⇒ mass Mg = 1937.3 g
⇒ mass Mg = 1.937 Kg
by atomic mass
B.
by atomic number
C.
by number of isotopes
D.
by electron mass
Answer:
B. By atomic number.
Explanation:
The atom is the most basic unit of matter with properties of a chemical element. The atom is the fundamental component of all matter. All atoms are made up of a central nucleus in which there are positively charged particles, the protons, around which other negatively charged particles, the electrons, move. The nucleus of the atom also has neutrons, which have a neutral charge.
The atomic number, which is represented by the letter Z, indicates the number of protons that are present in the nucleus of an atom. Determine the identity of an atom and its properties.
The atomic number is used to classify the elements within the periodic table of the elements.