Answer:
the basic unit of life is the cell
The Helium gas tends to behave as an ideal gas at 0temperature and 1 atm pressure.
By applying the real gas law to the gases at the high temperature,m the gases start to behave as the ideal gas.
The gas behaves at the ideal gas when the van der wall force between the gases has been the lowest and they tend to react less with the other atoms.
The Helium gas has the maximum tendency to behave as an ideal gas, as it has been the single atomic gas. Being single atomic, the gas tends to exhibit less forces, and the complete octet helps the gas to reactless with the other atoms.
Because of the characteristics, Helium acts as an ideal gas at STP.
Thus the Helium gas tends to behave as an ideal gas at 0temperature and 1 atm pressure.
For more information about the ideal gas, refer to the link:
number of protons
number of neutrons
number of valence electrons
c. Entropy
b. Heating curve
d. Free energy
Answer: a. Enthalpy
Explanation:
(b). Atoms transfer electronsto form cations and anions.
(c). Ions transfer electrons to form cations and anions.
(d). Anions and cations donate electrons.
Answer: (b). Atoms transfer electrons to form cations and anions.
Explanation:
Covalent compounds are formed by sharing of electrons takes place between non metals.Ionic compounds are formed by transfer of electrons between metals and non metals.
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Sodium atom has oxidation number of +1.
Electronic configuration of sodium:
Sodium atom will loose one electron to gain noble gas configuration and form sodium cation with +1 charge.
Chlorine atom has oxidation number of -1.
Electronic configuration of chlorine:
Chlorine atom will gain one electron to gain noble gas configuration and form chloride ion with -1 charge.
In sodium chloride the one electron from sodium metal gets transferred to chlorine atom and thus form an ionic bond.
Answer:
Atoms transfer electrons to form cations and anions.
Explanation:
Covalent compounds are formed by sharing of electrons takes place between non metals.Ionic compounds are formed by transfer of electrons between metals and non metals.
Answer:
Explanation:
A pure substance is a substance that consists of only one type of particle, either atoms, molecules, or ions, and has a consistent and uniform composition throughout. Pure substances cannot be separated into other substances by physical means. They have well-defined chemical properties and distinct physical properties, such as melting point and boiling point.
Two examples of pure substances are:
Elemental Hydrogen (H2): Elemental hydrogen consists of diatomic molecules, each containing two hydrogen atoms bonded together. It is a pure substance because it consists only of hydrogen molecules and cannot be separated into other substances without chemical reactions.
Water (H2O): Water is a pure substance composed of water molecules, each consisting of two hydrogen atoms and one oxygen atom bonded together. It is also a pure substance because it has a consistent and uniform composition throughout and cannot be separated into other substances without breaking its molecular bonds.
These examples illustrate the concept of pure substances, where the composition is homogeneous and consistent throughout the entire sample.
The answer is: The name of the positively charged nonmetal ion is changed to end in –ide.
For example, a chemical compound containing sodium and chlorine is binary ionic compound sodium chloride (NaCl).
In this compound, sodium (Na) has positive charge and chlorine (Cl) has negative charge.
Chlorine is nonmetal and sodium is metal.
Metals have positive charge and nonmetals negative.